Electronotes indices
Electronotes Newsletter
Electronotes Newsletter contains information related to the technical details of music synthesis and other sound processing, both equipment and methods and news, for readers who are at the level of a junior electrical engineering student or have a similar background.
Volume 1 to 4 were titled Electronotes Newsletter, volume 5 onwards were titled Electronotes: Newsletter of the Musical Engineering Group^{[1]}
Note: The 556 is the Motorola MC1456/MC1556 opamp, not the dual 555 timer. Any opamp with at least 2.5V/μs slew rate is suitable. The LF351 should work in its place.^{[2]}
Some of these are reprinted in the Builder's Guide and Preferred Circuits Collection in 1986.
Vol. 1 (Jan. 1972  Jun. 1972)
Date  Issue  Page  Topic  Author  Comments  Web 

21 Jan  1  1  Digital synthesiser (introduction)  B.H.  
20 Feb  2  1  Digital rhythm synthesiser  B.H.  
2 Mar  3  1  Digital melody synthesiser  B.H.  pg.3 (diagram page); diodes 2N4148 or sim should read diodes 1N4148 or sim^{[3]}  
20 Mar  4  1  (This issue contains only newsletter details and list of interesting papers)  B.H.  pg. 2 line 41; correct reference given in EN 5 line 36 of page 2^{[3]}  
20 Apr  5  2  Digital synthesiser  Final comments (almost)  B.H.  
5  Reader's circuits  VCO, fanout expander, clock for TTL  
6  Composition: Four sounds from the early days  B.H.  
6  Literature review  B.H.  
10 May  6  2  Editorial: The philosophy of electronic music  B.H.  
5  Reader's circuits: Neon oscillator, envelope shaper, resonant amplifier  pg.5 line 13; respective voltage strings should read respective resistor st^{[3]}  
6  Composition  B.H.  pg. 6 diagram; correct as given in EN 7, pg.7^{[3]}  
7  Literature review  B.H.  
10 Jun  7  4  Waveshaping  B.H.  pg. 6 FET WAVESHAPER; Other previous corrections notwithstanding, the two resistors marked R are both approximately equal to the channel resistance, R2 is the upper resistor to be trimmed for min. distortion^{[3]}  
7  Reader's equipment  Digital waveshaping system  pg. 8 Block Diagram; Draw line from Word Set Switches to Decoder^{[3]}  
10  Composition: Simple but useful echo effects with a stereo tape recorder  B.H.  
11  Literature review  B.H.  
13  Performance review: Electronotes tape, NonSuch Guide, SwitchedOn Bach  B.H.  
15  Product review: Total, Ionic, EMSA,  B.H.  
16  Mechanical standards for synthesisers  B.H.  
30 Jun  8  2  Fourier analysis  B.H.  
4  Reader's equipment: VCO, melody generator  
5  Composition  B.H.  pg. 5 diagram; correction given in EN 9, Pg.6 section 4a, first item.^{[3]}  
6  Literature review  B.H.  
7  Theory of hearing 1: An experiment  B.H.  
8  Experimenting with the NE566  Craig Anderton 
Vol. 2 (Jul. 1972  Dec. 1972)
Date  Issue  Page  Topic  Author  Comments  Web 

25 Jul  9  2  Envelope shaper  B.H.  
6  Reader's equipment: Antilog amp, signal generator, VCA  
7  Composition  B.H.  
8  Literature review  B.H.  
9  Product review: Buchla keyboard & Exar ICs  B.H.  
S003 Philosophy of electronic music 2  1 is in EN 6  B.H.  
10  Philosophy of electronic music 2: A critique and some comments on part 1  B.H.  
14  Signal interaction; mixing and forms of amplitude modulation  B.H.  pg. 14, line 11; should read ....problem of how precisely we define an^{[3]}  
16  Basic passive filters  Robert Rioja  
17  Musical acoustics 1  B.H.  
17  Theory of hearing 2, musical acoustics 2  B.H.  
10 Aug  10  1  Basic course in electronic music, lesson 1: Parts 13: Organisation & passive component  B.H.  pg.2, b. Monolithic Circuits:; make note here to see EN 13, Pg 13, sect.8d^{[3]}  
4  Reader's equipment: Power amp (1W)  
5  Composition: Tape delay line for EM  Tom Mintner  
6  Literature review: Papers  B.H.  
6  Performance review  A clockwork orange, by Walter Carlos  B.H.  
8  Envelope generator refinements 1  B.H.  pg. 8, 8b; see correction EN 11, pg.3 sect 4a, item 1^{[3]}  
8  A white noise source  B.H.  
30 Aug  11  1  Digisyntone corrections  B.H.  Original article in Radio Electronics, Sep 1970, po. 4751  
3  Reader's equipment: Noise sources  
3  Composition: Technique #1  John Marshall  
4  Literature review  B.H.  
5  Performance review: Carlos, Stockhausen & Electronic Concept Orchestra  B.H.  
6  Basic course: Lesson 2, part 4  Discrete active components  B.H.  
8  Envelope generator refinements 2  B.H.  
20 Sep  12  1  Systems theory in the design of electronic music systems  Glenn Sogge  
4  Multiplier modules, VCAs, modulators etc  B.H.  
4  Frequency shifting 1: Towards a poor man's frequency shifter  B.H.  
5  Digital harmonics 1, waveshaping 2  Games for 2 AM  B.H.  
7  Basic course, lesson 3, part 5  Integrated circuits  B.H. 


10 Oct  13  1  Frequency modulation  Applications  B.H. 


4  Reader's equipment  A TTL "Digisyntone", exponential VCO, phase shifter  D. Rossum  pg. 5, transistor T2 is NPN, the emitter goes to 15, arrow is down^{[3]}  
6  Composition: Classical phasing  Craig Anderton  
7  Literature review  B.H.  
8  Performance reviews: Pierre Henry, Charles Dodge, M.Czajkowski, M.Subotnick  B.H.  
9  Product review: Total "Octron  B.H.  
10  More on multipliers  B.H.  
11  Frequency shifting 2: Other methods  B.H.  
12  Digital harmonics 2  B.H.  pg. 12, line 2; no more and no less should read plus or minus a few degrees^{[3]}  
13  Basic course, lesson 4, part 7  10  B.H.  
16  Design considerations in synthesiser systems  Dave Rossum  pg. 16, Part 9, line 2 should read Part 7 above (not sect. 7 above)^{[3]}  
31 Oct  14  2  Phaselocked loops 1  B.H. 


4  Reader's equipment: Keyboard S&H, duophonic keyboard  D. Rossum  
6  Composition  B.H.  
6  Literature review: NE560567 PLLs etc  B.H.  
8  Product review: EML101, DEW  B.H.  
8  Basic course: Lesson 5, part 11  B.H.  
30 Nov  15  2  The rest of the voltage controlled modules, initial designs  B.H.  
7  Product review (PAiA, AEU, TNY)  B.H.  
7  Universal active filters  Dave Rossum  
8  Basic course, lesson 6, part 12  B.H.  
30 Dec  16  1  Introduction to Walsh functions  B.H.  
3  Reader's equipment: New exponential VCO and "chip" VCO  D. Rossum  Schematic in MEH, Ch. 3h p. 2  
4  Composition: Composing on a low budget!  B.H.  
5  Product review (Total Technology)  B.H.  
5  Fourier analysis 2: Common periodic functions  B.H.  
7  Basic course, part 13, a little integral calculus  B.H. 
Vol. 3 (Jan. 1973  Jun. 1973)
Date  Issue  Page  Topic  Author  Comments  Web 

30 Jan  17  2  An experimental additive synthesis device employing Walsh functions as harmonics  B.H.  
4  Reader's ideas: Fourier harmonics gen., relay step sequencer, spectrum sampler  
6  Performance review: Walter Sear, Bruce Hack, Beaver & Krause  B.H.  
7  Basic course, lesson 8, part 14, envelope waveforms  B.H.  
8  Deriving single pulses denoting single segments of Walsh waveforms  B.H.  
20 Feb  18  4  A new sampleandhold circuit  B.H.  
4  Composition: Organising for composition, part 1  B.H.  pg. 4, missing 12k resistor, see EN 19, page 1^{[3]}  
6  Literature review  B.H.  
6  Basic course, lesson 9, part 15, filters 1  B.H.  
10 Mar  19  1  Generation of envelopes using Walsh functions  Initial considerations  B.H.  
4  Composition: Organisation for composition, part 1  B.H.  
4  Educational aspects of electronic music: Teaching electronics  B.H.  
5  Literature review  B.H.  
5  Power supplies 1: Voltage regulators  Dave Rossum  
8  Theory of hearing 3: Pitch vs. frequency  B.H.  
10 Apr  20  2  Completed basic Walsh function synthesiser  Envelope control etc.  B.H.  
5  Construction outline  Part 1, items 1  12  B.H.  pg. 5, line 25, reference to EN 7 should be EN 17^{[3]}  
6  Hadamard and other transforms  B.H.  
30 Apr  21  1  Synthesiser keyboards  Dave Rossum  
4  Educational aspects of electronic music: Selling the synthesiser buy  B.H.  
4  Literature review  B.H.  
5  Product review: Synthi AKS, EMSA programmable waveform generator (PWG2), EMU  B.H.  
6  Basic course, lesson 10, part 16: Technical aspects of musical scales  B.H.  
20 May  22  1  Digital 4 bit envelope generator  Ralph Burhans  
5  Reader's ideas: Proposed design for a 4 part envelope generator  
6  On transient generators  Dave Rossum  
8  Basic course, lesson 11, part 17 reading  B.H.  pg. 8, make note here to see letter in EN 23, pg 2^{[3]}  
15 Jun  23  2  Comparison of methods for producing arbitrary waveforms and envelopes  Hal Chamberlin  
5  Composition: How to make a "raindrop" cannon  B.H.  
5  Educational aspects of electronic music  B.H.  
6  Literature review  B.H.  
8  Basic course, lesson 11, parts 17, a note in the life of a simple synthesiser, part 18, quiz  B.H.  
11  Construction outline  Part 2, items 13  17  B.H.  
12  Nonharmonic effects using Walsh functions, part 1  B.H.  
30 Jun  24  2  More thoughts on system design  Dave Rossum  pg. 4, line 9 of text, 6O0k resistor to the +15 supply should read: 300K resistor to the 15 supply.^{[3]}  
5  Educational aspects of electronic music  B.H.  
5  Literature review  B.H.  
6  Product review: Emu modules  B.H.  
6  Basic course, lesson 12, part 19: Some quiz answers and tips, part 20: What is S & H  B.H.  
7  Three additional electronic music applications of Walsh functions  B.H. 
Vol. 4 (Jul. 1973  Dec. 1973)
Date  Issue  Page  Topic  Author  Comments  Web 

20 Jul  25  2  The role of phase in waveshape and timbre  Hal Chamberlin  
5  Project ideas: Frequency doubler  B.H.  
5  Project ideas: VC phase delay between Walsh harmonic banks  B.H.  
6  Project ideas: PLLs and paralleling VCOs  B.H.  
7  Project ideas: Formant filtering, nonlinear VCF tracking, programmable patching  B.H.  
7  Project ideas: Development of Walsh generator VC phase shift system  B.H.  
8  Project ideas: Investigation of a variety of scales  B.H.  
8  Project ideas: Modulation and spectrum shifting, envelope selection for VCFs  B.H.  
8  Extensive study of literature on scientific studios of musical instruments  B.H.  
10 Aug  26  2  On changing linear waveforms and envelopes to exponential  B.H.  
5  Composition: Parameters of audio production  Steven Birchall  
6  Literature review  B.H.  
7  Basic course, lesson 13, part 21: Some mathematics and applications  B.H.  
30 Aug  27  1  Introduction to the new synthesiser (ENS73)  B.H.  
2  Literature review  B.H.  
4  Performance review: Second club tape  B.H.  
5  Product review  B.H.  
7  Errors in past issues  B.H.  
20 Sep  28  1  Presentation of the ENS73, part 1: The overall system and VCO options  B.H.  
15 Oct  29  1  Presentation of the ENS73, part 2: The minimal operational setup (ENS73MO)  D. Rossum  BG&PCC p. 145 and MEH 5c p.9 VCA  
5 Nov  30  2  Presentation of the ENS73, part 3: VCF2, noise 1, S&H 1  D. Rossum, B.H.  BG&PCC p. 249 noise source  
5  Literature review  B.H.  
7  Basic course: Lesson 14, part 22, More math with applications  B.H.  
30 Nov  31  3  Some notes on sequencers 1: (Controller series 1)  B.H.  
5  Reader's equipment: (Controller series 2)  
5  Basic course: Lesson 15, part 23, Maths with applications 3, part 24, Sampling a sawtooth  B.H.  
7  Presentation of the ENS73, part 4: Errors and additions, an example, parts and hints  B.H.  
9  Two experimental ribbon controllers (Controller series 3)  B.H.  
15 Dec  32  1  Imaginary conversation with a musician concerning some keyboard ideas  B.H.  
3  Composition: Some notes on sequencers 2 (Controller series 5)  B.H.  
5  Presentation of the ENS73, part 5: Corrections & troubleshooting, balanced modulator 1  B.H.  
6  Basic course: Lesson 16, part 25, Sampling a sawtooth 2  B.H.  
8  Polyphonic synthesisers  Dave Rossum 
Vol. 5 (Jan. 1974  Jun. 1974)
Date  Issue  Page  Topic  Author  Comments  Web 

1 Jan  33  3  Location modulation 1: Introduction to LM  B.H.  
5  Reader's equipment: SV VCF (3080), frequency doubler (sine), relay ADSR  T. Michaels  GS  
6  Composition: An S&H type sequencer can also be an ABA device (Controller series 8)  B.H.  
7  Literature review  B.H.  
7  Product review: Help building your ENS73 and others  B.H.  
8  Some initial "utility VCO" design ideas: 8038, CA3080 & 555 timer, thermal stability  B.H.  
25 Jan  34  3  Forum: Technology  B.H.  
3  Triple feature on digital electronic music equipment  B.H.  
3  a) Digital pointbypoint waveform generator  Hal Chamberlin  
8  b) The digital divider in music synthesis  John A. Ball  
13  c) An alldigital synthesiser: Sketches of the Psyctone II  Don Lancaster  
16  Reader's equipment: Four from Terry Mikulik  Mixer, noise/random, VCA, SV VCF  Terry Mikulik  BG&PCC p. 146 and MEH 5c p. 10 schematic only VCA.  GS  
18  Reader's ideas: Not an envelope generator, but...  
18  Literature review: Catching up on the theory of hearing  B.H.  
20  Using a keyboard to detect harmonics in a waveform  B.H.  
21  Basic course: Lesson 17, Part 25: PC boards  David Mitchell  
15 Feb  35  2  Universal music ?  Sebastian Von Hoerner  EN  
4  Reader's ideas: S&H as PLL phase detector, frequency multipliers  
6  Some initial ENS73 sequencer design ideas  B.H.  
8  TTL in synthesiser systems  Dave Rossum  
9  Basic course: Lesson 18, Part 26: IC substitution  B.H.  
5 Mar  36  2  Forum: Whither electronic music?  Larry Greisel  
3  Allen Watson III  B.H.  
4  ENS73: The utility VCO, option 2  B.H.  
7  Literature review  B.H.  
7  On voltage controlled filters  Dave Rossum  
8  Basic course: Lesson 19, Part 27: Transistor substitution  B.H.  
30 Mar  37  2  Exponential converters  Terry Mikulic  See also MEh, Ch. 5b, p. 14  EN GS 
4  Reader's equipment: Additions to Terry Mikulic's VCF in EN#34  MEH, Ch. 5d, p. 14  
5  Product review: Oberheim DS2 and APR 2600 mods, 360 systems, new EMU submodules  B.H.  
5  ENS73: VCF option 3  B.H.  
7  Basic course: Lesson 20, Part 28: Substitution of resistors and capacitors  B.H.  
20 Apr  38  2  Forum: Results of the composer survey and some comments  B.H.  
4  The FM spectrum of an exponential VCO: Expansion about the linear VCO solution  B.H.  
8  Literature review  B.H.  
9  Analogue switching circuits with the CA3080  B.H.  
20 May  39  2  Correction: ENS73 keyboard interface  B.H.  
2  Fourier series waveform generator, part 1  Hal Chamberlin  
6  Reader's ideas: PNP/NPN pairs, converting trianglesine, pulse conversion, voltage dividers  
6  Literature review  B.H.  
7  The FM spectrum of an exponential VCO: Part 2  B.H.  
8  Testing and calibrating  Part 1  B.H.  
20 Jun  40  4  A simple and inexpensive frequency counter  B.H.  
7  Reader's ideas: CA3080 VC resistor, three sequencers  
9  Aesthetics of new music: Three thoughts on electronic music  Jim Wilson  
11  Literature review: Books by Thomas Wells, Friend, Pearlman & Piggott, Stuart Hoenig  B.H.  
12  Product review: Small enterprise profile: #1 Electronotes, #2 Eu systems  B.H.  
14  The multitalented LM309 regulator  Craig Anderton  
15  Nonuniform comb filter spacings with respect to equally tempered scales  Ralph Burhans  
16  Formant modulation, timbre modulation & the interaction of formant filters & modulated sig.  B.H.  
18  Basic course: Lesson 21, Part 29: Understanding and adapting input structures  B.H. 
Vol. 6 (Jul. 1974  Dec. 1974)
Date  Issue  Page  Topic  Author  Comments  Web 

10 Jul  41  1  A four pole voltage controlled network: Analysis, design and application as a lowpass VCF and a quadrature VCO  B.H.  BG&PCC p. 164
MEH Ch. 5d p. 7 

8  Aesthetics of new music: Thoughts on electronic music II  Jim Wilson  
9  A simple VCA with applications (LM3900)  B.H.  
5 Aug  42  1  Introduction to computer music techniques  T. Joseph Zingheim  
5  The rate multiplier in music synthesis  Stephen Wilson  
8  Reader's equipment: Slew limiters  P. Titchener, T. Mikulic  BG&PCC p. 231  
9  Aesthetics of new music: Thoughts on electronic music III  Jim Wilson  
25 Aug  43  2  Design of 90 phase differencing networks and application to frequency shifter designing  B.H.  MEH, Ch. 6a, p. 6  
9  Project ideas: Fumucosyn  Ellis Cooper  
20 Sep  44  2  Some more LM3900 simpleminded circuits for synthesisers  Ralph Burhans  GS  
5  Composition: Techniques with a frequency shifter  B.H.  
7  Living with patch cords  B.H.  
8  Basic course: Lesson 22, part 30: Understanding and adapting output structures  B.H.  GS  
14 Oct  45  2  Forum: Editorial  Do you like opera?  B.H.  
2  An interview with Robert Moog, part 1: The first ten years  B.H.  
6  Reader's equipment: Two linear AD generators  
7  Literature review  B.H.  
11  The ENS74 home built synthesiser, part 1 (Keyboard & ADSR 1)  B.H.  BG&PCC p. 98, 190 schematic only.  
16  Antilog/exponential circuit provides over eight octaves  Charles Rogers, Dynasyn Corp.  
17  Surplus parts, power supplies and catastrophic failures  Dave Rossum  
18  Image generation using electronic synthesis techniques  B.H.  
20  The ideal keyboard  Richard Rae  
21  Transform methods in musical engineering, part 1  B.H.  
15 Nov  46  1  The ENS74 home built synthesiser, part 2 (VCOs)  B.H.  MEH, Ch. 5b, p.23  
5  Reader's equipment: Location modulation with two coordinate voltages  
8  Transform methods in musical engineering, part 2  B.H.  
15 Dec  47  3  An interview with Robert Moog, part 2: The present state of the art  B.H.  
5  Literature review  B.H.  
6  A brief glossary of electronic music terms for electrical engineers, part 1 (AF)  B.H.  
30 Dec  48  1  Reader's questions: Retriggering envelope generators  B.H.  
2  Reader's equipment: Analogue delay lines  
2  Literature review (Ear Magazine, Computer Hobbyist, Electronic Music Review)  B.H.  
4  Basic course: Lesson 23, part 31: "Magic" numbers in exponential conversion  M. Mellowitz  
4  A brief glossary of electronic music terms for electrical engineers, part 2 (GR)  B.H. 
Vol. 7 (Jan. 1975  Dec. 1975)
Date  Issue  Page  Topic  Author  Comments  Web 

Jan  49  2  The frequency modulation spectrum of an exponential VCO, part 3: Experimental verification and some suggested solutions  B.H.  
6  Some additional VCO design problems and solutions  B.H.  
8  A new exponential current source for the ENS74 VCO  B.H.  
10  A new VCO design: A VCO with sawtooth output and HF tracking and sync  B.H.  
11  A sourcelist of electronic music & musical engineering, part 1  B.H.  
Feb  50  1  Reader's questions: ENS74 triggering from a sequencer  B.H.  
4  An interview with Robert Moog, part 3: Trends for the future  B.H.  
10  A new ADSR envelope generator  B.H.  BG&PCC p. 63  
11  A brief glossary of electronic music terms for electrical engineers, part 2 (SZ & numbers)  B.H.  
16  A sourcelist of electronic music & musical engineering, part 2  B.H.  
Mar  51  2  Distorters  W. M. Hartman  
3  Reader's equipment: Two sequencer designs  T. Mikulic  GS  
7  Reader's ideas: "Slinky" reverb, ribbon controller, noise source  
7  Literature review  B.H.  
8  Product review: ARP, Aries, RMI, Roland, Korg & EML  B.H.  
10  Oscillator sync methods (Buzz Frappe, Eu Systems)  B.H.  
11  A sourcelist of electronic music & musical engineering, part 3  B.H.  
18  More applications of rate multiplier circuits  R. W. Burhans  
20  A gate and trigger delay unit  B.H.  
Apr  52  4  The ideal keyboard, part 2  Richard Rae  
7  Thoughts on digital keyboards  B.H.  
10  Guitar controllers for synthesisers  Bob Mustacich  
13  Reader's ideas: Breadboarding, and chip thermostating  
13  A sourcelist of electronic music & musical engineering, part 4  B.H.  
22  Product review: Wasatch music systems and Devtronix  B.H.  
May  53  3  Forum: Keyboards, frets and other controllers  R. W. Burhans  
3  Forum: On epoxy blocks and missing schematics  Larry Greisel  
4  Pitch extraction, part 1 (Basic approaches)  B.H.  
15  Reader's equipment: 8038 function generator  Craig Anderton  BG&PCC p. 140 LFO.  
16  Literature review: Musical engineers handbook  B.H.  
16  Product review: Polyphonic keyboard, guitar controllers, Omniphon, Axxe, Sequential  B.H.  
17  A sourcelist of electronic music & musical engineering, final part  B.H.  
Jun  54  2  Forum: 741s, 307s and 308s in exponential current sources  B.H.  
3  Dual feature on digital controllers:  B.H.  
4  Sequencers & programmable controllers, part 1  Douglas E. Fullmer  
8  Digivox II: Digital keyboard control for analogue music synthesisers  R. W. Burhans  
12  Reader's equipment: Envelope generators  W. M. Hartmann  
12  Project ideas: Bandpass filter bank used to adjust VCO, resetting sample & hold, slew limiting sample & hold, on making linear dynamic FM depth a feature of VCO design  B.H.  
14  Literature review: Musical engineers handbook  B.H.  
17  Pitch extraction, part 2: (progress report)  B.H.  
Jul  55  3  Pitch extraction, part 3: The complete experimental device  B.H.  IC 12 inputs are reversed from what they should be. IC 13 reverse pins 1 and 5. IC 26d should be driven by 26b not 26a.^{[4]}  
11  Literature review  B.H.  
17  A new sinewave shaper applied to a sweep generator design  B.H.  
20  A sourcelist of electronic music & musical engineering (addendum)  B.H.  
Aug  56  2  Analogue delay for musical engineers  B.H.  
Sep  57  2  Reader's questions: Chord playing buttons  B.H.  
3  Problems with the keyboard interface (ENS74)  B.H.  
4  A minicomputercontrolled music synthesiser  Michael R. Abram  
7  Reader's equipment: VCO  Paul Titchener  
9  Selection of opamps for power bandwidth  B.H.  
12  The measurement of phase difference  B.H.  
Oct  58  2  Forum: The origins of the term "flanging"  B.H.  
2  Forum: Letter from Scott Fraser  Tape recorders  B.H.  
5  Digital recording of melodies played on a keyboard by microprocessor control  M. Suchoff  
14  Voltagecontrolled highpass filters and other VCF structures  B.H.  
Nov  59  2  Forum: Phase shift networks and applications  B.H.  
2  Forum: On the relative merits of linear and exponential VCOs  B.H., J. Simonton  GS pp. 510  
11  Microprocessors in electronic music, part 1  Bill Hemsath  
13  Reader's equipment: VC slew limiter  P. Titchener  BG&PCC p. 232  
14  Literature review  B.H.  
16  Voltagecontrolled highpass filters and other VCF structures: Appendix A and appendix B  B.H.  
20  Popcorn noise and exponential generators  Charlie Thompson  
20  An indefinitely touch sensitive keyboard controller scheme using one pot.  J. Orion  
Dec  60  2  Electronic music studio hardware  W. M. Hartmann  
7  Reader's equipment: Envelope follower  Nicholas Collins  BG&PCC p. 151  NC  
8  A Hadamard transform network  Comments and reprint  B.H.  
14  The dawn of the future computer (or the start of a computer in every home)  Al Bushert  
16  Microprocessors in electronic music, part 2  Bill Hemsath  
19  Electronotes in 1975 and 1976  B.H. 
Vol. 8 (Jan. 1976  Dec. 1976)
Date  Issue  Page  Topic  Author  Comments  Web 

Jan  61  2  Forum: Addendum to the relative merits of linear and exponential VCOs  J. Simonton  GS  
4  Design and applications of sample & hold modules with slew limiting and cascading features  B.H.  BG&PCC p. 228  EN  
14  Microprocessors in electronic music, part 3  Bill Hemsath  
16  Two new analogue delay line circuits  Terry Mikulic, Jan Hall  GS  
19  News and notes  B.H.  
20  Back to basics  Resistor tolerances  B.H.  
Feb  62  2  Design ideas for digital keyboards  B.H., D.Williams, V. Huebner, G.Embler  
11  New design ideas for voltagecontrolled oscillators  B.H., C. Thompson, T. Mikulic,D. Kraul, T. Helfrich  Modification schematic in EN 194.  GS EN  
18  Microprocessors in electronic music, part 4  Bill Hemsath  
Mar  63  2  The ENS76 homebuilt synthesiser system  Part 1  B.H.  BG&PCC schematics only, p. 147 VCA, p. 196 balanced modulator  
8  Precise matching of transistors using synthesiser oscillators  Carl Fravel  
11  Analogue interfaces for microprocessor systems  Douglas Kraul  
14  Reviews of recorded music  Craig Anderton  
17  Back to basics 2  Triggering the 555 as a monostable  B.H.  
19  News and notes  B.H.  
Apr  64  3  Theory and applications of noise generators in electronic music  B.H.  BG&PCC p. 249  EN 
18  Voltagecontrolled amplifier as a balanced modulator  W. M. Hartmann  
18  Further comments on balanced modulators from two quadrant multipliers  B.H.  
19  Record review: The music of Penderecki  Al Halstead  
19  Equipment review: The Lyricon  Allan Cody  
20  Back to basics 3, resistor power ratings  B.H.  
21  Back to basics 4, the difference between positive and negative  B.H.  
May  65  3  Microprocessors in electronic music, part 5  Bill Hemsath  
5  Debounce scheme for scanningtype digital keyboards  Douglas Kraul  
9  An 8x512 random access memory for synthesiser applications  Vic Huebner  
11  Reader's equipment  A ±10KHz through zero linear VCO  Jan Hall  Schematic in BG&PCC p. 118  EN  
13  Record review  Synergy  Craig Anderton  
16  Literature review  Audio Handbook and periodicals  Craig Anderton, B.H.  
22  News and notes  B.H.  
Jun  66  2  Sine waves and VCFs  Do they mix?  B.H.  
3  The ENS76 homebuilt synthesiser system  Part 2 (EG options 1, 2 & 3)  B.H.  BG&PCC p. 183, options 1 & 2  
Jul  67  3  The Gilbert multiplier in electronic music  Dave Rossum  
7  Converting modules of ±5 volt standard to ±10 volt standard  B.H.  
11  Notes on the ENS74 keyboard interface unit  Ian Fritz  
13  The ENS76 homebuilt synthesiser system  Part 3; utility VCO  B.H.  Schematic in BG&PCC p. 117  
16  Comments on the triangletosawtooth conversion problems  W. M. Hartmann  
18  An eightbit pseudorandom generator  Vic Heubner  
19  Back to basics 5  D/A conversion for equal tempered scales  B.H.  
Aug  68  1  News and notes: Using the MN3001 analogue delay line chip  B.H.  
3  Project ideas: Nonlinear transfer function  B.H.  
8  Project ideas: Quantisers  B.H.  
10  The ENS76 homebuilt synthesiser system  Part 4: Instalment on the digital keyboard  B.H.  BG&PCC p. 88. Not velocitysensitive.  
20  Modifications to the Electronotes lowpass filter/quadrature oscillator and a possible new waveform technique with the unit  Ian Fritz  
Sep  69  2  News and notes  B.H.  
3  Design procedures for using exponential converters to perform mathematical operations  B.H.  
8  Circuits for the piecewiselinear technique of electronic music synthesisers  E.D.Cooper  
13  Applying the CA3140 opamp in electronic musical devices  B.H.  
17  A utility VCO with AM inputs  Jan R. Hall  Schematic in BG&PCC p. 119  
19  Record review: "Pieces for Kohn" by Tom Hamilton  Craig Anderton  
20  Literature review: Handbook of operational amplifier circuit design  D. Gualtieri  
21  Back to basics 6: Testing of voltage regulators  B.H.  
Oct  70  3  Frequency multiplication and division methods  B.H.  
18  8 voice digital keyboard design idea  Mark Goldstein  
21  Record review: Selected shorts, part 1  Craig Anderton  
Nov  71  3  The bandpass filter response and electronic music applications  B.H.  See also the comments in EN 72A^{[5]}  EN 
14  The ENS76 homebuilt synthesiser system  Part 5 (VCF options 1 & 2)  B.H.  Page 21, Fig. 8 please insert R48 (100K) on the wiper of the pot to inverting input of IC 7.^{[5]}BG&PCC p. 156 full article with correction.  
22  Record reviews  Craig Anderton  
Dec  72  3  Some theory on the design and application of variable slope filters  B.H.  
12  The ENS76 homebuilt synthesiser system  Part 6 (VCF 3, timbre modulator 1, delay 1)  B.H.  BG&PCC p. 166, p. 173, 255  EN pp. 1416  
21  Reader's circuits: FET as VCF, three waveshapers  Jacob Moskowitz, Ian Fritz  BG&PCC p. 145, p. 179 (only the first waveshaper) 
Vol. 9 (Jan. 1977  Dec. 1977)
Date  Issue  Page  Topic  Author  Comments  Web 

Jan  73  3  Reader's questions  
7  Report on new waveform techniques  Ian Fritz  
11  Debouncing in digital keyboards  Greg Mullin  
12  Improvements to digital tone generators  James Wirth  
14  Simple bandpass filter for filter bank design  B.H.  
19  Record review: "No Pussyfooting"  Craig Anderton  
21  Envelope generator employing diode logic  Joseph Medina  
Feb  74  3  News items and reader's questions  
7  Digital filter note 1  R. B. Tipton, V. M. Tipton  
14  Theory and design of a "responding" filter bank  B.H.  
21  Book review: National Semiconductor and Texas applications books  B.H.  
Mar  75  3  The ENS76 homebuilt synthesiser system  Part 7 (VCO options 1, 1a, 2, 3, 4 & 5)  B.H.  BG&PCC p. 103, (options 1, 1a & 2 only)  SS (option 1) 
Apr  76  2  News items and notes, reader's questions  B.H.  EN  
3  The ENS76 homebuilt synthesiser system  Part 8 (random source 1 & 2, further options)  B.H.  BG&PCC p. 285, 287  
16  Reader's equipment: gate & trigger unit, simple ADSR  
19  Record review: "Sequencer" by Larry Fast  Craig Anderton  
20  VCO drift  B.H.  
May  77  3  Digital filter note 2  R. B. Tipton, V. M. Tipton  
13  Comb filters applied to the pitch extraction problem  B.H.  
21  Record reviews: "Low" by Bowie, "TransEurope Express" by Kraftwerk  Craig Anderton  
Jun  78  3  Synthesis procedures for musical sounds  Part 1  B.H.  
11  Reevaluating the diatonic scale  Conversation with Marion McCoskey  Craig Anderton  
13  Electronic music applications of the XR206 monolithic function generator  S. Franco  
15  Two ICs for electronic music  SSM2020 and SSM2040  Dave Rossum  
Jul  79  5  Synthesis procedures for musical structures  Part 1  B.H.  
Aug  80  3  Synthesis procedures for musical structures (special effects)  Part 1  B.H.  
10  Review of periodic literature  B.H.  
Sep  81  3  Simple pitch extractor for clarinet  Ian Fritz  
8  A new design for a multimode voltagecontrolled filter  B.H.  
14  On improving mechanical performance of keyboards  W. J. Park  
15  Back to basics 7  Waveshaping  B.H.  
18  Reader's questions  B.H.  
Oct  82  1  Plans for 1978  B.H.  
3  Reader's questions  B.H.  
5  Mathematical analysis of differential amplifier triangletosine converters  B.H.  
17  Hints on setting up an electronic music working area  B.H.  BG&PCC p. 43  
20  Reader's circuits: quadrature oscillator  Ian Fritz  Page 21, the sine and 18k output should be from the other side of the 1k resistor between the FETs.^{[5]}  
Nov  83  2  Reader's questions  B.H.  
5  The ENS76 homebuilt synthesiser system  Part 9 (frequency shifter)  B.H.  Fig. 6 IC 1, the + and  inputs are reversed. R3, R4 junction to . R2, C1, C2 junction to + is correct.^{[4]}. BG&PCC p. 209  
19  Record review  Brian Eno, John Cage, LEM, Morton Subotnick, Pat Gleeson  Craig Anderton  
Dec  84  2  Reader's questions  B.H.  
5  A frequencytovoltage converter for use with pitchtovoltage conversion devices  Robert Iodice  
9  An oddharmonic to evenharmonic timbre modulator  B.H.  BG&PCC p. 175  
13  Clocking techniques for analogue delay lines  Craig Anderton  
15  Proposal for a type of "oral joystick"  Jeffrey Noble  
17  Reader's circuits  VCF with SSM2040  Rich Ryan  
19  Book reviews in brief  B.H. 
Vol. 10 (Jan. 1978  Dec. 1978)
Date  Issue  Page  Topic  Author  Comments  Web 

Jan  85  5  Additional ideas for voltagecontrolled filters  B.H.  EN  
5  1. Corner peaking of a fourpole filter  B.H.  
12  2. Obtaining bandpass and highpass functions from a four pole lowpass filter  B.H.  
16  3. Present day voltage controlled filter design options  B.H.  
18  Hints on obtaining parts for projects  B.H.  
Feb  86  3  Forum: Includes some corrections  B.H.  
5  Reader's questions: Shielded cable or hookup wire for audio lines, minimum phase  B.H.  
7  A gate driven secondorder envelopetransient generator  B.H.  BG&PCC p. 192 schematic only  
14  Woodwind type controller for synthesis, part 1: Electronic mouthpiece  Ian Fritz  
20  One chip envelope, gate and trigger extractor  Robert Iodice  BG&PCC p. 152 schematic only  
Mar  87  2  Reader's questions  B.H.  EN  
3  A sawtooth driven multiphase waveform animator: The synthesis of animated sounds. part 1  B.H.  BG&PCC p. 261  
11  Minimum parts count synthesiser  Dave Rossum  BG&PCC schematics only, p. 120 SSM2030 VCO, p.147 VCA, p. 165 2040 VCF, p. 191 2050 VCTG  
17  Using the Panasonic MN3005 4096 stage delay chip  Jan Hall  BG&PCC p. 256  
19  Reader's equipment: Guitar pickup  Dale Willis  
Apr  88  2  Reader's questions: Phaser or flanger, animated comment, validity of project  B.H.  
3  Woodwind type controller for synthesis, part 2: Keyswitch fingering system  Ian Fritz  
10  Literature review: Comments on Ernst's "The evolution of electronic music"  R.B.Elder  
15  Pitch extractor for guitar and microphone  Dale Wills  
23  Reader's equipment and ideas:  
23  A. Envelope follower with improved ripple and response time  D. Genovese  BG&PCC p. 153 schematic only  
24  B. LFO with ramp, inverted ramp, triangle and pulse width from 10% to 90%  P. Lutz  BG&PCC p. 139 schematic only  
26  C. Mixing plate based on capacitive coupling  D.Weiss  
26  D. Patch for controlled beating with two VCOs  D.Weiss  
27  E. Variable positive and negative waveform clippers  A.Halstead  
27  Basic applications of components available through Electronotes  B.H.  
May  89  2  Reader's questions: VCO resistor tolerance  B.H.  
3  Some comments on amplitude envelopes and their extraction  B.H.  BG&PCC p. 154 ripple reduction schematic  
Jun  90  2  Reader's questions: Nyquist etc  B.H.  
3  How I make my PC boards in a matter of few hours  B.H.  BG&PCC p. 47  
6  A high ripple VCF for waveform animation: The synthesis of animated sounds. part 2  B.H.  BG&PCC p. 168 schematic only  
18  Record reviews: Moroder, Kraftwerk, Tangerine Dream, Tomita, Genesis, Eno, Bowie  Craig Anderton  
Jul  91  1  Corrections to frequency shifter and pitch extractor  B.H.  
3  Review of homebuilt equipment, or, what's in the preferred circuit collection  B.H.  BG&PCC p. 267  
13  A few remarks on current tendencies in synthesised music  R. Bruce Elder  
16  Additional notes on bandpass filters  B.H.  
20  A sourcelist on pitch extraction, 1978  B.H.  
Aug  92  2  Reader's questions: 8038, opamp noise  B.H.  
3  The first 100 Electronotes application notes: Numerical listing  B.H.  
5  The first 100 Electronotes application notes: Subject listing  B.H.  
7  Fast envelope extraction by maximum station sampling  B.H.  
10  Filter banks with multiple outputs  B.H.  
12  Modified AD + AR envelope generator design  Ian Fritz  BG&PCC p. 193 schematic only  
14  A quasidigital BiNTic filter  Jan Hall  BG&PCC p. 169 schematic only  EN  
14  Digital keyboard revisited  Richard Curcio  RC  
18  The ear  Part 1: Basic idea on pitch perception  B.H.  
20  Reader's comments  N. Rose, W. Norcross, N. Bodley, R. Graham, C. Cooper, L. King  
Sep  93  2  Reader's questions: Real frequencies, how Electronotes started, analogue reverb  B.H.  
3  The ear  Part 2: An observational basis for pitch perception theories  B.H.  
11  A sourcelist on pitch perception  1978  B.H.  
18  A cascadedmonostable type generalised resonator: The synthesis of animated sounds, part 3  B.H.  
Oct  94  3  Reader's questions: Part sources, power supply lines  B.H.  
4  The ear  Part 3: Models and phenomenon vs place and finestructure theory  B.H.  
Nov  95  1  Reader's questions: MEG etc  B.H.  
3  The migration of poles as a function of feedback in a class of voltagecontrolled filter  B.H.  
Dec  96  2  Reader's questions: Computer controlled synthesisers  B.H.  
3  Review of periodicals of interest to our readers  B.H.  
7  Master list of Electronotes publications  B.H.  
9  Master index to Electronotes publications 19721978  B.H. 
Vol. 11 (Jan. 1979  Dec. 1979)
Date  Issue  Page  Topic  Author  Comments  Web 

Jan  97  3  Some comments on the state of music synthesis  1979  Part 1  B.H.  
7  A brief note on polygon filters  Richard Bjorkman  EN  
9  A few more notes on polygon filters  B.H.  
10  A four, six and eight pole voltage controlled filter  B.H.  BG&PCC p. 176, schematic only, 2 x SSM2040  
17  Literature review: Electronic trade journals  1978  Part 1  B.H.  
Feb  98  2  Reader's questions: Just intonation, frequency shifting vs pitch shifting  B.H.  
3  Putting your circuit boards inside something  B.H.  BG&PCC p. 50  
5  Preset circuitry for synthesisers  Lester Ludwig  
9  A squarewave frequencydivision suboctave crossproduct module: It's relationship with Lie algebra and other related processes  Lester Ludwig  
15  A cure for "overtracking" in an exponential converter  Ian Fritz  
17  A general purpose 1 volt/octave VCO using the 8038 IC  Jan Hall  
19  Record review: Cluster & Eno, Devo, Jarre, Bowie, Vangelis, Gleeson, Synergy, Stepian  Anderton  
20  Literature review: Electronic trade journals  1978  Part 2  B.H.  
Mar  99  1  Reader's questions: Sampleandhold droop, VCA feedthrough  B.H.  
3  A fourth order statevariable filter  Bob Chidlaw  
13  A reasonably good pitch extractor "back end"  B.H.  
17  More suggestions on actually getting construction underway  B.H.  BG&PCC p. 59  
20  Literature review: Electronic trade journals  1978  Part 3  B.H.  
Apr  100  1  News and notes: New VCA ICs  B.H.  
2  Reader's questions: Reversing low priority keyboards, MIL spec  B.H.  
3  The ear  Part 4: Recent developments regarding pitch perception  B.H.  
13  A short primer on vocoders  B.H.  
15  Vocoder design using statevariable filter structures  Jan Hall  
20  Some brief reflections on 100 issues of Electronotes  B.H.  
May  101  3  An experimental correlator/convolver for electronic music  B.H.  
Jun  102  2  A vocaleffects waveform animator: The synthesis of "animated" sound  Part 4  B.H.  BG&PCC p. 262  EN 
Jul  103  2  A vocaleffects waveform animator: The synthesis of "animated" sound  Part 4 (addendum)  B.H.  
6  Linear applications of CMOS logic  Hal Chamberlin  
9  Course review  Techniques of computer sound synthesis  Hal Chamberlin  
Aug  104  1  Reader's questions: Capacitor codes, resistor power ratings  B.H.  
3  Some comments on the state of music synthesis  1979, part 2  B.H.  
7  Appendix A: New ideas on filter bank design  B.H.  
9  Appendix B: Pseudorandom tonewheel  B.H.  
Sep  105  2  Reader's questions: Finding patents, blown LF351s  B.H.  
3  The effects of feedback on fourpole filters with differing pole frequencies  B.H.  
Oct  106  3  A pseudorandom tonewheel animator: The synthesis of "animated" sound  Part 5  B.H.  
21  Book review: Don Lancaster  The incredible secret money machine  B.H.  
Nov  107  2  Reader's questions: Getting patents, top octaves  B.H.  
3  The new OTAs: The CA3280 and the LM13600  B.H.  
13  A (gulp!) simple balanced fourquadrant multiplier with an OTA  B.H.  EN  
16  Filter bank design  Ian Fritz  EN  
Dec  108  2  Reader's questions: Analogue keyboard interface problems  B.H.  
3  Some interesting audio visual analogues  B.H.  
4  A selfmodulating VCO, revisited  B.H.  
6  Multiphased waveform animator with reduced part count and two extensions  L. Ludwig  EN  
9  A new look at pulsewidth modulation  Part 1  B.H.  
16  A generalised linear amplitude processor  Lester Ludwig  
19  Notes on noise, fractional calculus and the variable slope filter  Normand Provencher 
Vol. 12 (Jan. 1980  Dec. 1980)
Date  Issue  Page  Topic  Author  Comments  Web 

Jan  109  1  Reader's questions: Speak & Spell, AD818 alternatives, alternative analogue delays  B.H.  
3  Uniform variable slope processor  Lester Ludwig  
Feb  110  1  A short list of "buzz words" for IC buyers and users  B.H.  EN  
3  A new look at pulsewidth modulation  Part 2  B.H.  
18  An "articulating" contour generator  B.H.  
Mar  111  1  A collection of reader submitted and reader inspired ideas:   B.H.  
3  A: Alternative to the CA3080 simple VCO  B. Hutchins, Ron Teel  
5  B: Warping the response of a linear input attenuator  Richard Brewster  
6  C: A linear ADSR envelope generator  William park  
7  D: Unusual biquad and statevariable type configurations  B. Hutchins, Norman Rose  
10  E: Simple voltagecontrolled amplifier with 4009 CMOS chip  Mike Yantis  
12  F: Bodyproximity controllers for voltagecontrolled synthesisers  John Valente  
13  G: Frequency halver for triangle and sine waves  B. Hutchins, Iggy Foulke  
14  H: Some unusual highQ circuits  B. Hutchins, Tom La Mar  
19  I: Controlledcurrent switching oscillator  Ian Fritz  EN  
20  J: Simulated waveform generation with a programmable calculator  B. Hutchins, Allen Eaton  
21  K: Sync circuit for ENS76 VCO option 1  Richard Brewster  
Apr  112  2  Reader's questions: Modulation bandwidth for CV inputs  B.H.  
3  A solution to the mystery of the variableslope filter  Lee Powell  
10  A new sample and hold circuit  John Talbert  GS  
13  Some results of reversing input and ground with some filter structures  B.H.  
18  Ultrasonic VCO with digital waveform generator  Ian Fritz  
May  113  1  Reader's questions: Through zero FM  B.H.  EN  
3  Switchable VCA/balanced modulator based on the LM/XR13600 OTA  Ian Fritz  BG&PCC p. 201  
8  Comments on the new 13600 and 3280 OTA device  Serge Tcherepnin  
11  Spectra of some simple shiftregister sequences:  B.H.  
Jul  114  3  Four voice digital keyboard interface  Bob Chidlaw  
9  Spectra of some dualpulse waveforms  B.H.  
Jul  115  1  Time reversing oscillators and through zero FM  B.H.  EN  
3  A 39channel variableQ filter bank  Part 1  B.H.  
Aug  116  1  News and notes: CEM3350 and CEM3360  B.H.  EN  
2  Reader's questions: Preferred circuits collection S&H option 2  B.H.  
3  A 39channel variableQ filter bank  Part 2  B.H.  
Sep  117  1  Reader's questions: Paralleling OTAs  B.H.  
3  A delayline/phaseshifter based filter bank (Theta processor)  B.H.  
Oct  118  1  Reader's questions: Books on circuitry, voltage shifting  B.H.  
3  A new look at pulsewidth modulation  Part 3  Lester Ludwig and Bernie Hutchins  
Nov  119  2  From the lab notebook: The digital divider as a "vibrato killer"  B.H.  
3  A balanced modulator application of VCA chips  Thomas Henry  
7  A pitchtovoltage converter for a polyphonic guitar synthesiser  Tony Dean  
12  A method for measuring modulation bandwidth  Normand Provencher  
13  Frequency division of sine waves  Normand Provencher  
15  How many kinds of square wave are there?  Normand Provencher  
16  Some notes on pseudorandom noise generators  B.H.  
Dec  120  1  Electronotes publications  B.H.  
1  Newcomer's page: Timbre  B.H.  
1  Electronotes application notes 1976  1980, numerical listing  B.H.  
1  Master index of Electronotes publications 1972  1980  B.H. 
Vol. 13 (Jan. 1981  Dec. 1981)
Date  Issue  Page  Topic  Author  Comments  Web 

Jan  121  3  Lab notebook  Effects of PW drivers on short PWM tones  B.H.  
4  Newcomer's page  Fourier series  B.H.  
5  Fourier series results for some simple new waveshapers  B.H.  
13  Two hints for using the CEM3340 IC  Thomas Henry  
16  Stability in linear systems  Routh's criterion  B.H.  
22  A brief note on variable slope spectra and self modulation  B.H.  
Feb  122  2  More on the CEM3340 IC  Thomas Henry/Doug Curtis  
3  Lab notebook  Distortion of triangletosine converters  B.H.  
4  Newcomer's page  Strange numbers  B.H.  
5  Making rack panels  Thomas Henry  BG&PCC p. 53  
9  Square law attenuator  Normand Provencher  
10  Determining the probability of saturation of Gaussian noise  Normand Provencher  
13  A function generator with "quadrature" triangle wave outputs  Thomas Henry  
Mar  123  1  Reader's questions: instrument waveshapes, bandpass filter orders, IC sockets  B.H.  
3  Lab notebook  More tests of triangletosine converters  B.H.  
4  Newcomer's page  Pitch  B.H.  
5  Pitch, filtered noise, suggested experiments  B.H.  
9  A few more variableslope ideas  Normand Provencher  
14  Browser's report  Normand Provencher  
15  Review of recorded music  Craig Anderton  
17  Book reviews  B.H.  
19  An addon suboctave circuit for VCOs  B.H.  
Apr  124  2  Book review: "A biography of computer music" by Sandra L. Tjepkema  B.H.  
3  Lab notebook  Modulations with the voice  B.H.  
4  Newcomer's page  What is digital?  B.H.  
10  Design of simple quantizers  B. Hutchins plus Mike Conrad  
19  The ARP surplus threeoctave keyboard  Dev Gualtieri  BG&PCC p. 100  
May  125  1  Source list of electronic music and musical engineering (1978, 1979, 1980)  B.H.  
Jun  126  2  Reader's questions: Sinewave LFO  B.H.  
3  Lab notebook  Tests of an extension of standard frequency modulation patches  B.H.  
4  Newcomer's page  Digital synthesis of music  B.H.  
5  The reciprocal squarelaw attenuator  Normand Provencher  
7  A new selfvarying gate and trigger delay unit  Lester Ludwig  
10  Redundancy in music as a reason for parametric music synthesis  B.H.  
Jul  127  2  Reader's questions: quadratic formula  B.H.  
3  Lab notebook  A couple of circuits for throughzero VCOs  B.H.  
4  Newcomer's page  Looking for the parts you need  B.H.  
5  GLAP revisited: smaller parts count using CEM3330, constant power correction and image angle curves  Lester Ludwig  
9  Brief notes on integrator phase compensation  B.H.  
Aug  128  2  Reader's questions: animation vs modulation, fast or finite transfer functions  B.H.  
3  Lab notebook  Comb filter tests of animators  B.H.  
4  Newcomer's page  Getting publications  B.H.  
5  Theory and design of electronic percussion instruments based on the bandpass resonator  B.H.  
Sep  129  2  Newcomer's page  Getting publications  B.H.  EN  
3  A VCO with throughzero FM capabilities  B.H. based on ideas by D. Kraul and R. Moog  BG&PCC p. 121.  
Oct  130  1  News and notes: Passport Designs, SSM2012, SSM2022, SSM2033, SSM2056 & SSM2100  B.H.  
2  Newcomer's page  Getting publications  B.H.  
3  A VOSIM processor [including PCB layout],  Devlin M. Gualtieri  
Nov  131  3  Lab notebook  Coupled VCOs  B.H.  
4  Newcomer's page  Interpreting schematic diagrams  B.H.  
5  The drumhead problem  The vibrating membrane  B.H.  EN  
14  Le Gendre filters  Normand Provencher  
18  Those marvelous whale songs  B.H.  
Dec  132  3  Animation of live sounds  B.H.  
4  Newcomer's page  Interpreting schematic diagrams  B.H.  
5  Simple equipment for an electronic music "utility" panel  B.H.  
5  1. Microphone amplifier  B.H.  
5  2. Mix/gain/monitor unit  B.H.  
6  3. Flipflop unit  B.H.  
6  4. Output filters for tape recording  B.H.  
7  5. Headphonespeaker amplifier/attenuator  B.H.  
8  6. Comparator/differencer/rectifier unit  B.H.  
9  7. Ramp generator/oscillator  B.H.  
10  8. DC source/ultrafine tuner  B.H.  
11  Possible new electronic musical instrument based on selfsustained oscillator principles  B.H.  
19  A proposed design of a "mallet" controller  B.H. 
Vol. 14 (Jan. 1982  Jun. 1983)
Date  Issue  Page  Topic  Author  Comments  Web 

Jan  133  2  Reader's questions: Cassettes in electronic music, AES preprints  B.H.  
3  Lab notebook  Measuring the spectra of noise  B.H.  
4  Newcomer's page  Mathematical transforms  B.H.  
5  Integrated musical electronics  Part 1  B.H.  
8  The analytic signal as a unifying concept for modulation processes  Normand Provencher  
18  Review of recorded music  Musical perspectives  Craig Anderton  
Feb  134  1  Reader's questions: Opamp poles  B.H.  
2  Monthly literature review  "Electronic music circuits" by Barry Klein  B.H.  
3  Lab notebook  More transistor noise spectra  B.H.  
4  Newcomer's page  Modular systems and patching  B.H.  
5  Integrated musical electronics  Part 2  B.H.  BG&PCC p. 199  
7  An introduction to Hilbert transform theory and applications  B.H.  
17  Tricoloured LED indicates voltage peaks  B.H.  
Mar  135  3  Monthly literature review  List of AN201 to AN242  B.H.  
4  More on the experimental mallet controller  B. Hutchins, T. Henry, A. Berg  
Apr  136  1  Monthly literature review  Journal of troublefinding research  B.H.  
2  A pitch extraction scheme based on Hilbert transformation  B. Hutchins, D. Parola, L. Ludwig  
May  137  2  Lab notebook  Comparisons of exponential decay, linear and convex envelope shapes for decay  B.H.  
3  Coupled resonator and other methods of achieving twostage amplitude decay  B.H.  
Jun  138  2  Low key digital keyboard  B.H.  
Jul  139  2  Methods of digital oscillator design based on digital filter structures  B.H.  
Aug  140  1  A summary of OTA control current methods  B.H.  
3  Some useful frequency response calculations avoiding factoring  B.H.  
Sep  141  2  Newcomer's page  State variable filters  B.H.  EN  
3  Some new results concerning Q enhancement in OTA based VCFs  B.H.  
Oct  142  1  Choices between analogue and digital synthesis  B.H.  
3  Some remarks on the "copying problem"  B.H.  
4  A new triangletosine converter using a 1496type multiplier  Terry Michaels  Previously credited as Terry Mikulic  
Nov  143  2  Newcomer's page  Digital structures and hardware  B.H.  
3  Guide to digital filter network design  Chapter 1  B.H.  
9  Integrated musical electronics  Part 3: Better use of VCF chips  B.H.  
Dec 82  Feb 83  144 A (EN 144 – 146)  2  Digital envelope generator design based on digital filter structures  B.H.  
11  Guide to digital filter network design  Chapter 2: Mathematical basis for analysis & design  B.H.  
29  The effect of effective sample & hold with digital signals  B.H.  
Mar 83  Jun 83  147 B (EN 147 – 150)  1  Meet the SN76477  Thomas Henry  
3  Guide to digital filter network design  Chapter 3: Filtering with delay line networks  B.H.  
13  Guide to digital filter network design  Chapter 4: Design of finite impulse response filters  B.H.  
29  A proposed FIR digital filter approach to variableslope filtering  B.H. 
Vol. 15 (Jul. 1983  Dec. 1987)
Date  Issue  Page  Topic  Author  Comments  Web 

Jul 83  Oct 83  151 C (EN 151 – 154)  1  Reader's questions: Digital allpass filters, FIR poles  B.H.  
3  Guide to digital filter network design  Chapter 5: Design of IIR filters  B.H.  
29  A possible mechanism for electronic tuning of hair cells in the ear  B.H.  
Nov 83  Apr 84  155 D (EN 155 – 160)  1  Reader's questions: Substitute parts, imperfect harmonics  B.H.  
3  Review of Fourier methods in signal processing and musical engineering  B.H.  
3  Definition and notation  B.H.  
4  Complex numbers  B.H.  
5  The trigonometric Fourier series  B.H.  
6  The complex Fourier series  B.H.  
7  Example using TFS and CFS  B.H.  
10  Side trip to Fourier transform  B.H.  
13  Fourier series as a sampled Fourier transform  B.H.  
17  Complex Fourier series of a piecewise constant waveform  B.H.  
19  Discrete Fourier transform and its inverse  B.H.  
21  Interpretation of the DFT equation  B.H.  
22  Evaluation of the DFT and IDFT  B.H.  
27  The fast Fourier transform  B.H.  
35  Spectral analysis with the DFT/FFT  B.H.  
41  Refinement and subtle points of the FFT spectral analysis  B.H.  
46  The FFT route to convolution of sequences  B.H.  
49  Signal synthesis using inverse DFT/FFT  B.H.  
May 84  Jul 84  161 E (EN 161  163)  2  Cautions on waveforms and spectra  B.H.  
3  Harmonics of harmonicas  David Staver  
11  Build a precision clock controller  Thomas Henry  
18  On the implementation of variable digital filters with fixed clock rate  B.H.  
Jul 86  164 F (EN 164 – 167)  1  Reader's questions  Microphone amplifiers  B.H.  
3  Interpolation, decimation and prediction of digital signals  B.H.  
47  Compensation of linear circuit blocks for the effects of real operational amplifiers  B.H.  
66  Another (easier) way of understanding the Hilbert transform based pitch extractor  B.H.  
68  Book reviews  B.H.  
70  A fourpole variable digital filter with fixed clock rate  B. Hutchins and Eric Multanen  
79  Some comments on digital sampling instruments  B.H.  
Dec 87  168 G (EN 168)  3  Design of wideband analogue 90' phase differencing networks without large spread of capacitor values  B.H.  EN  
10  Corrections of interpolation, decimation and prediction of digital signals  B.H.  EN 
Vol. 16 (Jan. 1988  Jul. 1989)
Date  Issue  Page  Topic  Author  Comments  Web 

Jan  169  2  Problems of recovering the analogue signal from digital samples  B.H.  
Feb  170  1  Reader's questions: Interpolation  B.H.  
3  Introduction to adaptive filters of several types  B.H.  
Apr  171  1  Book review  DSP  B.H.  ECE426  
3  Review of frequency modulation synthesis techniques of musical sound  B.H.  
Jul  172  1  Book review  Books on speech  B.H.  
2  Interpolating samples with the DFT/FFT  B.H.  
May 89  173  1  Book review  B.H.  
3  Processing of informationbearing signals for pitchchanging, timebase changing and information preservation  B.H.  
Jun  174  1  Reader's questions: Digital reconstruction filters  B.H.  
3  Overflow oscillations and the "Mickey Mouse" fractal  Part 1  B.H. 
Vol. 17 (Aug. 1989  Jul. 1992)
Date  Issue  Page  Topic  Author  Comments  Web 

Aug 89  175  1  Reader's questions: DSP  C compiler or assembly language  B.H.  ECE426  
3  New simplified equiripple design algorithm for FIR filters  B.H.  
Jul 90  176  1  Breadboarding  B.H.  
3  An initial study of the use of chaotic signals in synthesis of animated musical tones  B.H.  
Nov 90  177  1  Reader's questions: Restoring LPs  B.H.  
3  Spawning locations and mechanisms for overflow oscillation modes in a secondorder digital oscillator  B.H.  
Jul 91  178  1  Two roads to narrowband chaos  B.H.  
3  Narrowband chaos achieved with Duffing's equation with possible musical synthesis applications  Eric Demers  
35  A new adaptive filter simulator  B.H.  EN  
Jun 92  179  1  A leastsquare and minmax error examination of the musical scale question  B.H.  
3  Prediction, deconvolution and system identification: Part 1  Undriven systems  B.H.  
Jul 92  180  3  Prediction, deconvolution and system identification: Part 2  Driven systems  B.H. 
Vol. 18 (Apr. 1993  Sep. 1995)
Date  Issue  Page  Topic  Author  Comments  Web 

Apr 83  181  1  Holes in a simulated frequency response measurement  F. Fox and B. Hutchins  
16  An interesting special case of an LMS adaptive filter  B.H.  
25  Practical aspects of obtaining spectra from FFTs  B.H.  
Apr 84  182  3  Four useful examples involving piecewiseconstant and piecewisecontinuous functions  B.H.  
Oct 94  183  3  Basic principles of adaptive system modelling  B.H.  
Dec 94  184  3  The importance of the notation of band limiting and sample reconstruction  B.H.  
Feb 95  185  3  Sample rate changing and corresponding effects on normalised and unnormalised spectra description  B.H.  
Sep 95  186  3  Frequency errors and distortion in digital sinewave oscillators  B.H.  Possible program error in data on page 48  EN 
Vol. 19 (Aug. 1996  Mar. 2000)
Date  Issue  Page  Topic  Author  Comments  Web 

Aug 96  187  1  Book review  The computer music tutorial  B.H.  
3  Sampling and recovering based on an average sampling rate  B.H.  
33  Bob Moog visits Cornell  B.H.  
Feb 97  188  1  It's better than TV  B.H.  
3  Calculating the DFT and the Fourier series  Each with the other  B.H.  
18  Upboxes and downboxes  Time and frequency response  Making sense?  B.H.  
Aug 97  189  1  A preference for acoustic sounds  B.H.  
3  Exploiting the periodic frequency response of discretetime filters  B.H.  
12  Timedomain zeropadding and the DFT  B.H.  
Aug 98  190  1  To bib or not to bib  B.H.  On the problems/difficulties of including bibliographies.  
3  The strange case of unconjugated poles and negative frequencies  B.H.  
14  Internal decimation  B.H.  
30  A minmax polynomialfitting curiosity  B.H.  
Dec 1999  191  2  Analog signal processing chapters 1 and 2  B.H.  EN  
Feb 2000  192  1  Zeros at infinity  B.H.  EN  
2  Analog signal processing chapter 3  B.H.  
Mar 2000  193  1  A Butterworth that peaks!  B.H.  EN  
2  Analog signal processing chapter 4  B.H. 
Vol. 20 ( Apr. 2000  Sep. 2001)
Date  Issue  Page  Topic  Author  Comments  Web 

Apr 2000  194  1  Modifications to a VCO  T. Mikulic  VCO of EN 62  EN 
2  Analog signal processing chapters 5 and 6  B.H.  
Jul 2000  195  2  Active sensitivity in a compensated statevariable filter  B.H.  EN  
2  Analog signal processing chapter 7  B.H.  
Dec 2000  196  2  Tuning equations derived from passive sensitivities  B.H.  EN  
2  Analog signal processing chapters 8, 9 and 10  B.H.  
Apr 2001  197  1  Analog signal processing corner: The strange root locus of negative gain VCVS  B.H.  EN  
2  Basic elements of digital signal processing: Introduction to the series  B.H.  
3  Basic elements of digital signal processing filter element, part 1  B.H.  
Jun 2001  198  1  Analog corner: Measuring Q with decrement  B.H.  EN  
2  Basic elements of digital signal processing filter element, part 2  B.H. 
Vol. 21 (Dec. 2001  Aug. 2003)
Date  Issue  Page  Topic  Author  Comments  Web 

Sep 2001  199  1  Analog corner reducing the accumulating gain  via Thevenin  B.H.  EN  
3  Basic elements of digital signal processing filter element  Part 3  B.H.  
Dec 2001  200  1  Further adventures with analog synthesizer newsgroups  B.H.  EN  
3  Basic elements of digital signal processing sampling element  B.H.  
56  Troubleshooting  Always a connection?  B.H.  
Feb 2002  201  1  Analog signal processing corner secondorder time overshoot: A secondorder envelope generator?  B.H.  EN ECE426  
7  Some additional sampling examples  B.H.  
Aug 2003  202  1  Book reviews (Analog Days, etc)  B.H.  EN ECE426  
3  Active compensation of SallenKey lowpass filters  B.H.  
20  The curious ambiguous length of a triangular window  B.H.  
Jan 2004  203  1  Bittersweet  B.H.  On acknowledging sources and the TVA using the Electronotes name  EN 
3  An intuitive approach to polyphase rate changing  B.H.  
Aug 2004  204  1  Reader's question (recovering a sinewave from samples)  B.H.  EN  
5  Basic elements of digital signal processing  Finite wordlength effects (part 1)  B.H. 
Vol. 22 (Mar. 2008  Feb. 2012)
Date  Issue  Page  Topic  Author  Comments  Web 

Mar 2008  205  3  Samplerate changing by polyphase on demand  B.H.  EN  
17  Recovery from bunched sampling  B.H.  
Dec 2010  206  1  Negative frequencies and throughzero frequency modulation  B.H., D. Kraul, B. Moog  EN  
Dec 2011  207  1  Tools for investigating Kautz functions  B.H.  EN  
Jan 2012  208  1  A white noise curiosity  B.H.  EN  
Feb 2012  209  1  Basic elements of digital signal processing – finite wordlength effects (part 2)  B.H.  EN  
May 2012  210  1  RC lowpass revisited  B.H.  EN  
Jul 2012  211  1  Engineering models  B.H.  EN  
Dec 2012  212  1  The sound of a bouncing ball  B.H.  EN  
12  DACs for pseudorandom noise sequences  
Jan 2013  213  1  Musical scales revisited  B.H.  EN  
30  Beating revisited  
Feb 2013  214  1  Compensation of circuit blocks for opamp poles  Revisited  B.H.  EN 
Vol. 23
Date  Issue  Page  Topic  Author  Comments  Web 

May 2013  215  1  Revisited  Some VCF ideas  B.H.  EN  
Jul 2013  216  1  Revisited  Pulsewidth modulation  B.H.  EN  
Sep 2013  217  1  What about: Selffrequencymodulation  B.H.  EN  
Oct 2013  218  1  Dispersion of "tone bursts" as a means of forming musical sounds  B.H.  EN  
Nov 2013  219  1  Feedback revisited  Gain due to feedback  B.H.  EN  
Jan 2014  220  1  Reviewing the current state of music synthesis  B.H.  EN  
Mar 2014  221  1  Resonators and friends  Prony with noise  B.H.  EN  
Jun 2014  222  1  FFT  Interpolation in time and frequency  B.H.  EN  
Nov 2014  223  1  Timeseries smoothing  A review  B.H.  EN  
Feb 2015  224  1  Variableslope filtering  Revisited  B.H.  EN  
Sep 2015  225  1  Filtering with "rings" of poles/zeros  B.H.  EN  
Jan 2016  226  1  Linear and exponential ramps  B.H.  EN  
Feb 2016  227  1  FFT of chirps  Linear FM  B.H.  EN 
Vol. 24
Date  Issue  Page  Topic  Author  Comments  Web 

Jun 2016  228  1  Waveshaping  Static and dynamic  B.H.  EN  
Mar 2017  229  1  Pitch vs. frequency  B.H.  EN 
Supplements
Supplements originally were to fill in more basic or transient content. Superseded by Application Notes. Later only 14, 15, 16 and 17 were made available.
Date  Issue  Topic  Author  Comments  Web 

Jun 1972  S 1  The opamp in electronic music  B.H.  pg. 7, Equation near top right Q =∆/f_{0} should read Q = f_{0}/∆^{[3]}  
S 2  (List of publications of interest in popular literature, included in later lists.^{[6]})  B.H.  
Jul 1972  S 3  Philosophy of Electronic Music Pt 2: this is EN 9 pp1014; 'Pt 1' is EN 6 pp25  B.H.  
S 4  (List of publications of interest in popular literature, included in later lists.^{[6]})  B.H.  
S 5  (A listing of some electronic music works, replaced by S 12.^{[6]})  B.H.  
S 6  (On the use of zener diode voltage regulators, replaced by later information.^{[6]})  B.H.  
Dec 1972  S 7  Digivox user's guide  R. Burhans  EN  
Dec 1972  S 8  Hybrid voltagecontrolled digital electronic music systems considerations – with EN 16  B.H., Tom Wells, Simon Benlevy 

EN 
Apr 1973  S 9  Scales of 1 to 49 tones  B.H.  
Apr 1974  S 10  Starting to use a voltagecontrolled electronic music synthesiser  B.H.  
Jun 1974  S 11  Notes on the spring 1974 meetings of the Cornell musical engineering group  B.H.  
May 1974  S 12  Listening list of contemporary music of all types  B.H.  
Jun 1974  S 13  Notes on troubleshooting the ENS73 in EN 28 – EN 37  B.H.  
7 Jun 1977  S 14  New approaches to analog music synthesis  B.H.  
Jul 1977  S 15  Transform methods in musical engineering  B.H.  
1978  S 16  Laboratory problems and examples in active, voltagecontrolled and delay line networks:

B.H.  EN  
Aug  Dec 1977  S 17  Literature evaluation LE1  LE10  B.H.  
Aug 1979  S 18  TI59 program for roots of a polynomial  B.H.  
Spring 1981  S 19  Log and exponential (antilog) circuits  B.H.  EN 
Application Notes
Application Notes are shorter, more tutorial, aimed at a somewhat wider range of signal processing and general electrical/electronic engineering applications.
Some of these are reprinted in the Builder's Guide and Preferred Circuits Collection in 1986.
Date  Issue  Topic  Author  Comments  Web 

4 Aug 1976  AN 1  Five volt one amp power supplies for TTL  B.H.  BG&PCC p. 77  EN 
11 Aug 1976  AN 2  Bipolar 15 volt supplies for opamps  B.H.  BG&PCC p. 79  EN 
18 Aug 1976  AN 3  Use of IC voltage regulators for powering equipment from car batteries  B.H.  
25 Aug 1976  AN 4  Testing and using LED's and LED readouts  B.H.  
4 Sep 1976  AN 5  Notch filters for hum rejection  B.H.  
11 Sep 1976  AN 6  Using the 555 as a monostable  B.H.  
18 Sep 1976  AN 7  Design of secondorder lowpass filters  B.H.  
25 Sep 1976  AN 8  Design of fourthorder lowpass filters  B.H.  
4 Oct 1976  AN 9  Circuit for detecting slowly changing signals  B.H.  
11 Oct 1976  AN 10  IC amplifier selection guide  B.H.  
18 Oct 1976  AN 11  Determining the "Q" of a statevariable filter  B.H.  
25 Oct 1976  AN 12  The biquad active filter circuit  B.H.  
4 Nov 1976  AN 13  Equalisers and tone controls  B.H.  
11 Nov 1976  AN 14  How to actually build something part 1: Parts and supplies  B.H.  BG&PCC p. 63  EN 
18 Nov 1976  AN 15  How to actually build something  Part 2: Circuit boards  B.H.  BG&PCC p. 65  
25 Nov 1976  AN 16  How to actually build something  Part 3: Soldering in parts  B.H.  BG&PCC p. 67  
4 Dec 1976  AN 17  How to actually build something  Part 4: Packaging  B.H.  BG&PCC p. 69  
11 Dec 1976  AN 18  How to actually build something  Part 5: Miscellaneous hints  B.H.  BG&PCC p. 71  
18 Dec 1976  AN 19  Simple linear voltagecontrolled oscillator  B.H.  
25 Dec 1976  AN 20  Improving the linear VCO  B.H.  
4 Jan 1977  AN 21  Applying the CA3080 OTA  B.H.  EN  
11 Jan 1977  AN 22  Gain control applications of the CA3080  B.H.  
18 Jan 1977  AN 23  The CA3080 as a voltagecontrolled resistor  B.H.  
25 Jan 1976  AN 24  Overdriven, saturating, and switching applications of the CA3080  B.H.  
4 Feb 1977  AN 25  LowQ bandpass filter  B.H.  
11 Feb 1977  AN 26  Bandpass filter examples  B.H.  
18 Feb 1977  AN 27  Simple clocking oscillators for digital IC's  B.H.  
25 Feb 1977  AN 28  Simple opamp multivibrator circuit  B.H.  
5 Mar 1977  AN 29  Simple sinewave oscillators  B.H.  BG&PCC p. 133 LFO  
11 Mar 1977  AN 30  More clocking oscillators with digital IC's  B.H.  EN  
18 Mar 1977  AN 31  Schmitt trigger circuits with ICs  B.H.  
25 Mar 1977  AN 32  The 555 as a collection of devices  B.H.  
4 Apr 1977  AN 33  Simple interface circuits with CMOS  B.H.  
11 Apr 1977  AN 34  Delay line setup with the MN3001  B.H.  
18 Apr 1977  AN 35  Delay line setup with the SAD1024  B.H.  BG&PCC p. 257  
25 Apr 1977  AN 36  Applying delay line evaluation setups  B.H.  
4 May 1977  AN 37  HighQ bandpass filter  B.H.  
11 May 1977  AN 38  HighQ bandpass filter example  B.H.  
18 May 1977  AN 39  Design of secondorder highpass filters  B.H.  
25 May 1977  AN 40  Design of fourthorder highpass filters  B.H.  
4 Jun 1977  AN 41  Summing amplifiers  B.H.  
11 Jun 1977  AN 42  RMS to DC converter  B.H.  
18 Jun 1977  AN 43  Selecting resistors for a given application  B.H.  
25 Jun 1977  AN 44  Selecting capacitors for a given application  B.H.  
4 Jul 1977  AN 45  Graphical determination of frequency response  Splane case  B.H.  
11 Jul 1977  AN 46  Graphical determination of phase response  B.H.  
18 Jul 1977  AN 47  Graphical relationships in the Zplane  B.H.  
25 Jul 1977  AN 48  Zplane graphical relationships for firstorder systems  B.H.  
4 Aug 1977  AN 49  Zplane graphical relationships  A secondorder example  B.H.  
11 Aug 1977  AN 50  Discrete time allpass networks  B.H.  
18 Aug 1977  AN 51  Discrete time notch filters  B.H.  
25 Aug 1977  AN 52  Relationships for higherorder discrete time filters  B.H.  
4 Sep 1977  AN 53  Graphs for decibels  B.H.  
11 Sep 1977  AN 54  A staircase wave generation technique  B.H.  
18 Sep 1977  AN 55  Rfilters  B.H.  
25 Sep 1977  AN 56  Rfilter method of opamp frequency response testing  B.H.  
4 Oct 1977  AN 57  Algebra tricks we have all forgotten  B.H.  
11 Oct 1977  AN 58  Some hard to remember things about trigonometry  B.H.  
18 Oct 1977  AN 59  Some easily forgotten things about complex numbers  B.H.  
25 Oct 1977  AN 60  Hyperbolic functions  B.H.  Page 2 the second term should be "3" not "3!", remove the "!" from the tan and tanh expressions.^{[5]}  
4 Nov 1977  AN 61  Fourier series square wave example  B.H.  
11 Nov 1977  AN 62  Lowpassed square wave  Time analysis  B.H.  
18 Nov 1977  AN 63  Lowpassed square wave  Frequency analysis  B.H.  
25 Nov 1977  AN 64  Reference table  Fourier series  B.H.  
4 Dec 1977  AN 65  Single stage phase shifter  B.H.  
11 Dec 1977  AN 66  Lissajous figures  B.H.  
18 Dec 1977  AN 67  Simple trianglesquare oscillator  B.H.  BG&PCC p. 135 LFO  EN 
25 Dec 1977  AN 68  Analogue multipliers  B.H.  
4 Jan 1978  AN 69  Additional analogue multipliers  Chuck Rogers  
11 Jan 1978  AN 70  Signal splitting techniques  Seamour Solutions  
18 Jan 1978  AN 71  Multimode filter based on firstorder lowpass  B.H.  EN  
25 Jan 1978  AN 72  The twinT filter  B.H.  
4 Feb 1978  AN 73  Multiphase scanning with sawtooth waveforms  B.H., Lester Ludwig  EN  
11 Feb 1978  AN 74  Mathematical factoring  B.H.  
18 Feb 1978  AN 75  Designing Butterworth filters without data  B.H.  
25 Feb 1978  AN 76  Graphical methods for Chebyshev pole placements  B.H.  
4 Mar 1978  AN 77  TI 58/59 program for T(s)  B.H.  
11 Mar 1978  AN 78  TI 58/59 program for H(z)  B.H.  
18 Mar 1978  AN 79  Some simple sawtooth wave generators  B.H.  BG&PCC p. 137 LFO  
25 Mar 1978  AN 80  Handling and application precautions for FET input opamps  B.H.  
4 Apr 1978  AN 81  TI59 program for highripple Chebyshev poles  B.H.  
11 Apr 1978  AN 82  Data for highripple Chebyshev filters  B.H.  
18 Apr 1978  AN 83  Alarm circuit  B.H.  
25 Apr 1978  AN 84  Reference levels for decibels  B.H.  
4 May 1978  AN 85  Measuring opamp parameters: Openloop gain  B.H.  
11 May 1978  AN 86  Measuring opamp parameters: Input error values  B.H.  
18 May 1978  AN 87  Measuring opamp parameters: Output drive limitations  B.H.  
25 May 1978  AN 88  Measuring opamp parameters: Input resistance, CMRR  B.H.  
4 Jun 1978  AN 89  Measuring opamp parameters: Bandwidth limitations  B.H.  
11 Jun 1978  AN 90  Resonant peaking in secondorder filters  B.H.  
18 Jun 1978  AN 91  DC gain of statevariable filters  B.H.  
25 Jun 1978  AN 92  Three ways to partial fractions  B.H.  
4 Jul 1978  AN 93  Logic decisions with opamps  B.H.  
11 Jul 1978  AN 94  N or more of M  Opamp logic  B.H.  
18 Jul 1978  AN 95  AC amplifiers with opamps  B.H.  
25 Jul 1978  AN 96  TI59 program for 90° phase differencing networks  Mark Swartwout  
4 Aug 1978  AN 97  The transferable power supply  B.H.  EN  
11 Aug 1978  AN 98  IC regulators for small bench supplies  B.H.  BG&PCC p. 81  EN 
18 Aug 1978  AN 99  TI59 program for the "Deliyannis" bandpass filter  B.H.  
25 Aug 1978  AN 100  Opamp selection guide  1978  B.H.  
4 Sep 1978  AN 101  Delay lines setup with the MN3003  B.H.  
11 Sep 1978  AN 102  Bipolar summing control with one pot  B.H.  
18 Sep 1978  AN 103  Secondorder step response  B.H.  EN  
25 Sep 1978  AN 104  A hidden bandpass decoupling stage  B.H.  
4 Oct 1978  AN 105  Considerations for bilinear ztransformed delay line networks  B.H.  
11 Oct 1978  AN 106  Current mirrors  B.H.  
18 Oct 1978  AN 107  Matched filters for sequence detection  B.H.  
25 Oct 1978  AN 108  Series expansions (where calculators fear to tread)  B.H.  
5 Nov 1978  AN 109  Taylor series expansions  B.H.  
11 Nov 1978  AN 110  Some useful series expansions  B.H.  
18 Nov 1978  AN 111  TI59 program for Bessel functions  B.H.  
25 Nov 1978  AN 112  Differential and buffered differential amplifiers  B.H.  
5 Dec 1978  AN 113  Biquadratic functions with statevariable filters  B.H.  
11 Dec 1978  AN 114  A frequencytovoltage converter  B.H.  
18 Dec 1978  AN 115  Triangletosine converters using nonlinear shapers  B.H.  
25 Dec 1978  AN 116  Triangletosine conversion based on power series  B.H.  
4 Jan 1979  AN 117  Transversal digital filter demonstration program for TI59 calculator  B.H.  
11 Jan 1979  AN 118  Transversal filter program  Instructions and examples  B.H.  
18 Jan 1979  AN 119  More transversal filter examples  B.H.  
25 Jan 1979  AN 120  Fullwave rectifiers  B.H.  
5 Feb 1979  AN 121  A statevariable configuration with constant peak response  B.H.  EN  
15 Feb 1979  AN 122  AC amplifiers with transistors  B.H.  
25 Feb 1979  AN 123  Single supply setup for IC amplifiers  B.H.  
4 Mar 1979  AN 124  An experimental switched capacitor filter  B.H.  
11 Mar 1979  AN 125  Applying the AD581 voltage reference  B.H.  
18 Mar 1979  AN 126  A lockin detector circuit  B.H.  
25 Mar 1979  AN 127  Applying the lockin detector  B.H.  
5 Apr 1979  AN 128  A semiautomatic CA3080 selection scheme  B.H.  
15 Apr 1979  AN 129  Touchcontrolled switches  1  B.H.  
25 Apr 1979  AN 130  Touchcontrolled switches  2  B.H.  
4 May 1979  AN 131  Troubleshooting  1  B.H.  BG&PCC p. 275  
11 May 1979  AN 132  Troubleshooting  2  B.H.  BG&PCC p. 277  
18 May 1979  AN 133  Troubleshooting  3  B.H.  BG&PCC p. 279  
25 May 1979  AN 134  Troubleshooting  4  B.H.  BG&PCC p. 281  
5 Jun 1979  AN 135  Controlvoltage test sequencer  B.H.  
15 Jun 1979  AN 136  An opamp supply based on a 12.6V filament transformer  B.H.  BG&PCC p. 83  
25 Jun 1979  AN 137  A switched capacitor statevariable filter  B.H.  
4 Jul 1979  AN 138  Applying the multiplefeedback infinitegain lowpass filter  B.H.  
11 Jul 1979  AN 139  Catalogue  Secondorder step response  B.H.  
18 Jul 1979  AN 140  The measurement of phase  B.H.  
25 Jul 1979  AN 141  TI59  PC100A program for Deliyannis bandpass filter  B.H.  
5 Aug 1979  AN 142  The documentation of electronic circuits  B.H.  
15 Aug 1979  AN 143  Simple noise sources  B.H.  BG&PCC p. 251  
25 Aug 1979  AN 144  Simple tricks with logic gates  B.H.  
4 Sep 1979  AN 145  Analysis of the "Deliyannis" bandpass filter  B.H.  
11 Sep 1979  AN 146  TI59 program for secondorder bilinearZ lowpass  B.H.  
18 Sep 1979  AN 147  Choice of design parameters for analogue delay line comb filters  B.H.  
25 Sep 1979  AN 148  Digital frequency dividers  Integer division  1  B.H.  
5 Oct 1979  AN 149  Digital frequency dividers  Integer division  2  B.H.  
15 Oct 1979  AN 150  Digital frequency dividers  Integer division  3  B.H.  
25 Oct 1979  AN 151  Digital frequency dividers  Integer division  4  B.H.  
4 Nov 1979  AN 152  Digital frequency dividers  Noninteger division  B.H.  
11 Nov 1979  AN 153  Frequency multiplication  1  B.H.  
18 Nov 1979  AN 154  Frequency multiplication  2  B.H.  
25 Nov 1979  AN 155  Frequency multiplication  3  B.H.  
5 Dec 1979  AN 156  Secondorder frequency response  B.H.  
15 Dec 1979  AN 157  Secondorder frequency response  Curve data  B.H.  
25 Dec 1979  AN 158  Transconductor transfer curves for the CA3080  B.H.  
4 Jan 1980  AN 159  Bugs and debugs  Series 1  B.H.  
11 Jan 1980  AN 160  Efficient calculation of the Fourier series of rectangular functions  B.H.  EN  
18 Jan 1980  AN 161  Correlationcancellation loops  1, basics  B.H.  
25 Jan 1980  AN 162  Correlationcancellation loops  2, experimental circuit  B.H.  
5 Feb 1980  AN 163  Correlationcancellation loops  3, loop with quadrature reference  B.H.  
15 Feb 1980  AN 164  Correlationcancellation loops  4, additional comments  B.H.  
25 Feb 1980  AN 165  90° phasedifference networks  Basics and data  B.H.  
4 Mar 1980  AN 166  90° phasedifference networks  Use of phase shift sections  B.H.  
11 Mar 1980  AN 167  90° phasedifference networks  Secondorder allpass networks  1  B.H.  EN  
18 Mar 1980  AN 168  Secondorder allpass networks  2  B.H.  
25 Mar 1980  AN 169  Secondorder allpass networks  3  B.H.  
5 Apr 1980  AN 170  Secondorder allpass networks  4  B.H.  
15 Apr 1980  AN 171  Analogue integrators  1, basics: Stability, true and leaky integrators  B.H.  
25 Apr 1980  AN 172  Analogue integrators  2, the leaky integrator  A lowpass filter  B.H.  
4 May 1980  AN 173  Analogue integrators  3, positive, summed, and differential integrators  B.H.  
11 May 1980  AN 174  Analogue integrators  4, the Deboo integrator  B.H.  
18 May 1980  AN 175  Analogue integrators  5, response of a stable integrator  B.H.  
25 May 1980  AN 176  Analogue integrators  6, miscellaneous observations  B.H.  
5 Jun 1980  AN 177  Applications of uncompensated opamps  B.H.  
15 Jun 1980  AN 178  Basics  Opamps  B.H.  
25 Jun 1980  AN 179  Basics  Opamps  A bit more  B.H.  
4 Jul 1980  AN 180  Basics  Logic ICs  B.H.  
11 Jul 1980  AN 181  Basics  Miscellaneous ICs  B.H.  
18 Jul 1980  AN 182  Secondorder lowpass filters using voltage follower  B.H.  
25 Jul 1980  AN 183  Elements of notch filter design  B.H.  
5 Aug 1980  AN 184  Selection of notch and bandstop responses  B.H.  
15 Aug 1980  AN 185  Notch filter using simulated inductor  B.H.  
25 Aug 1980  AN 186  Statevariable inputnotch structure  B.H.  
4 Sep 1980  AN 187  Statevariable outputnotch structure  B.H.  
11 Sep 1980  AN 188  The bootstrapped twinT notch  B.H.  
18 Sep 1980  AN 189  Notch filters using bandpass subtraction  B.H.  
25 Sep 1980  AN 190  A sawtooth frequency multiplier  B.H.  
5 Oct 1980  AN 191  The basic ideas of calculus  B.H.  
15 Oct 1980  AN 192  The basic ideas of complex numbers  B.H.  
25 Oct 1980  AN 193  Philosophy of mathematical models  B.H.  
4 Nov 1980  AN 194  Simple shelving equaliser  B.H.  EN  
11 Nov 1980  AN 195  Precision work with 5% resistors  B.H.  
18 Nov 1980  AN 196  Capacitors  1  B.H.  
25 Nov 1980  AN 197  Capacitors  2  B.H.  
5 Dec 1980  AN 198  Distortion  1  B.H.  
15 Dec 1980  AN 199  Distortion  2  B.H.  
25 Dec 1980  AN 200  Some simple good design ideas  B.H.  EN  
4 Jan 1981  AN 201  Fourier series coefficients from Fourier transform  B.H.  
11 Jan 81  AN 202  A feedforward almostflash A/D converter  B.H.  
18 Jan 1981  AN 203  Fourquadrant multiplier based on operational transconductance amplifier  B.H.  
25 Jan 1981  AN 204  Quadrature circuits for amplitude detection and frequency differencing  B.H.  
5 Feb 1981  AN 205  Relationships between trigonometric and complex Fourier series  B.H.  
15 Feb 1981  AN 206  Amplitude spectra from Fourier series coefficients  B.H.  
25 Feb 1981  AN 207  High order Butterworth filters  Design  B.H.  
4 Mar 1981  AN 208  High order Butterworth filters  Trimming  B.H.  
11 Mar 1981  AN 209  Limited depth notch filtering  B.H.  
18 Mar 1981  AN 210  AC amplifiers with opamps: High frequency limits  B.H.  
25 Mar 1981  AN 211  Mathematical notation and conventions  English letters and symbols  B.H.  
5 Apr 1981  AN 212  Mathematical notation and conventions  Greek letters and symbols  B.H.  
15 Apr 1981  AN 213  Mathematical notation and conventions  Misc. terms and symbols  B.H.  
25 Apr 1981  AN 214  Thirdorder lowpass with unitygain follower  B.H.  
4 May 1981  AN 215  A simple midrange booster  B.H.  
11 May 1981  AN 216  Bench loudspeaker amplifier with opamps  B.H.  
18 May 1981  AN 217  Phaselocked loops  1  B.H.  
25 May 1981  AN 218  Phaselocked loops  2  B.H.  
5 Jun 1981  AN 219  Phaselocked loops  3  B.H.  
15 Jun 1981  AN 220  Phaselocked loops  4  B.H.  
25 Jun 1981  AN 221  Phaselocked loops  5  B.H.  
4 Jul 1981  AN 222  Working with finite gainbandwidthproduct opamps  1, amplifiers  B.H.  
11 Jul 1981  AN 223  Working with finite gainbandwidthproduct opamps  2, SallenKey filters  B.H.  
18 Jul 1981  AN 224  Working with finite gainbandwidthproduct opamps  3, NFIG filters  B.H.  
25 Jul 1981  AN 225  Working with finite gainbandwidthproduct opamps  4, integrators  B.H.  
5 Aug 1981  AN 226  Quantization errors in digital systems  1, large, complex, signals  B.H.  
15 Aug 1981  AN 227  Quantization errors in digital systems  2, lowlevel simple signals  B.H.  
25 Aug 1981  AN 228  Spectral shaping of hold devices  B.H.  
4 Sep 1981  AN 229  Simple signal prediction systems  B.H.  
11 Sep 1981  AN 230  Distortion in digitally generated sine waves, part 1  B.H.  
18 Sep 1981  AN 231  Distortion in digitally generated sine waves, part 2  B.H.  
25 Sep 1981  AN 232  Resistor averaging networks  B.H.  
5 Oct 1981  AN 233  Resistor level shifting networks, part 1  Theory  B.H.  
15 Oct 1981  AN 234  Resistor level shifting networks, part 2  Formulas and examples  B.H.  
25 Oct 1981  AN 235  Active, noninverting level shifting  B.H.  EN  
4 Nov 1981  AN 236  Response of equal tap weight FIR filters  B.H.  
11 Nov 1981  AN 237  FIR filters with triangle and square tap weights  B.H.  
18 Nov 1981  AN 238  FIR filters with sinusoidal tap weights  B.H.  
25 Nov 1981  AN 239  FIR filters from Fourierseries of ideal response  B.H.  
5 Dec 1981  AN 240  Dimensional analysis  B.H.  
15 Dec 1981  AN 241  Angles for pole plotting  B.H.  
25 Dec 1981  AN 242  TI59 program for Chebyshev poles  B.H.  
5 Jan 1982  AN 243  Inductance simulation with a gyrator  B.H.  
20 Jan 1982  AN 244  Filter based on opamp poles  B.H.  
5 Feb 1982  AN 245  FIR filters with square wave taps  B.H.  
20 Feb 1982  AN 246  The prewarp problem in bilinearZ method  1  B.H.  
5 Mar 1981  AN 247  The prewarp problem in bilinearZ method  2  B.H.  
20 Mar 1982  AN 248  The prewarp problem in bilinearZ method  3  B.H.  
5 Apr 1982  AN 249  Calculations for space satellites  1  B.H.  
20 Apr 1980  AN 250  Calculations for space satellites  2  B.H.  
5 May 1982  AN 251  New frequency response program for TI59  B.H.  
20 May 1982  AN 252  The theory of FIR filter frequency response  1  B.H.  
5 Jun 1982  AN 253  The theory of FIR filter frequency response  2  B.H.  
20 Jun 1982  AN 254  TI59 Program for H(z) based on FIR filter taps  B.H.  
5 Jul 1982  AN 255  TI59 Program for H(z) without factoring  B.H.  
20 Jul 1982  AN 256  TI59 Program for T(s) without factoring  B.H.  EN  
5 Aug 1982  AN 257  Opamp noise gain  B.H.  
20 Aug 1982  AN 258  Notes on various window functions  B.H.  
5 Sep 1982  AN 259  Windowing of FIR filter taps  1  B.H.  
20 Sep 1982  AN 260  Windowing of FIR filter taps  2  B.H.  
5 Oct 1982  AN 261  TI59 program for FIR filter taps  B.H.  
20 Oct 1982  AN 262  FIR filters with exponential taps  B.H.  
5 Nov 1982  AN 263  Bilinear Z design program for TI59/PC100A  B.H.  
20 Nov 1982  AN 264  Bilinear Ztransform design example  B.H.  
5 Dec 1982  AN 265  Design of digital Hilbert transformers  B.H.  
20 Dec 1982  AN 266  Active compensation of the integrator  B.H.  
5 Jan 1983  AN 267  Impulse invariance digital filter design  1  B.H.  
15 Jan 1983  AN 268  Impulse invariance digital filter design  2  B.H.  
25 Jan 1983  AN 269  Impulse invariance digital filter design  3  B.H.  
5 Feb 1983  AN 270  Frequency tuning of digital filters  B.H.  
15 Feb 1983  AN 271  Frequency response of bandpass filters  B.H.  EN  
25 Feb 1983  AN 272  Time response of bandpass filters  B.H.  
5 Mar 1983  AN 273  Bessel filter poles  B.H.  
15 Mar 1983  AN 274  Bessel filter example  B.H.  
25 Mar 1983  AN 275  Design of Chebyshev filters  1  B.H.  
5 Apr 1983  AN 276  Design of Chebyshev filters  2  B.H.  
15 Apr 1983  AN 277  Introduction to elliptical filters  B.H.  
25 Apr 1983  AN 278  Numerical aids to filter tuning  B.H.  
5 May 1983  AN 279  Measuring the Q of bandpass filters  B.H.  
15 May 1983  AN 280  Highpass from lowpass  Example  B.H.  
Jun 1983  AN 281  Active simulation of passive LC filters  B.H.  
Jan 1986  AN 283  Negative gain VCVS lowpass  B.H.  
Feb 1986  AN 284  Passive sensitivity [lowpass filters]  B.H.  
Mar 1986  AN 285  Notes on calculating passive sensitivity  B.H.  
Apr 1986  AN 286  Useful hints on setting up and correctly solving active networks  B.H.  
May 1986  AN 287  Biquadratic circuit realisations  B.H.  
Jun 1986  AN 288  Notes on impulse invariance  B.H.  
Jul 1986  AN 289  Wires  B.H.  
Aug 1986  AN 290  Identification of parts  B.H.  
Sep 1986  AN 291  Digital lattice filters  B.H.  
Oct 1986  AN 292  Windows for signal processing  B.H.  
Nov/Dec 1986  AN 293  Frequency sample filters and related devices  B.H.  
Jan 1987  AN 294  Analysis of switched capacitor integrator configurations  B.H.  
Feb/Mar/Apr 1987  AN 295  Finite word length effects in digital filters  B.H.  
May 1987  AN 296  A coefficient roundoff sensitivity example  B.H.  
Jun/Jul 1987  AN 297  Coefficient space study of secondorder digital filters  B.H.  
Aug 1987  AN 298  A class of limit cycles  B.H.  
Sep/Oct 1987  AN 299  Design considerations for digital sinewave oscillators  B.H.  
Nov/Dec 1987  AN 300  Three random points about random signals (i) addition of noise sources  B.H.  
Three random points about random signals (ii) signal to noise ratio improved by parallel amplifiers  B.H.  
Three random points about random signals (iii) quantization noise  B.H.  
Mar 1988  AN 301  Filters based on MFIG bandpass and related topics  B.H.  
May 1988  AN 302  TMS32010 EVM terminal program  B.H.  
Jun 1988  AN 303  TMS32010 terminal program instructions  B.H.  
Jul 1988  AN 304  TMS terminal program install guide  B.H.  
Sep 1988  AN 305  Fourier series of piecewise constant functions  B.H.  
Dec 1988  AN 306  Peak amplitude response in secondorder digital filters  B.H.  
Aug 1989  AN 307  Some notes on digital sequence generation  B.H.  
Jan 1990  AN 308  Fourier series of piecewise continuous functions  B.H.  
Sep 1990  AN 309  A view of a digital sinewave oscillator  B.H.  
Oct 1990  AN 310  Smallscale limit cycles due to truncation  B.H.  
Nov 1990  AN 311  Extensions of equiripple FIR filter design  B.H.  
Dec 1990  AN 312  An intuitive approach to FFT algorithms  B.H.  EN ECE426  
Jan 1991  AN 313  Options for lowfrequency quadrature digital oscillators  B.H.  
Aug 1991  AN 314  Additional quadrature oscillator methods  B.H.  
Nov 1991  AN 315  Leastsquared error filter design  B.H.  
Dec 1991  AN 316  Leastsquare filters for nonintegrator delay and interpolation  B.H.  
Jan 1992  AN 317  Polynomial fitting for samplerate changing at rational and irrational frequency ratios  B.H.  EN  
Feb 1992  AN 318  Time domain leastsquared lowpass filters  B.H.  EN  
Mar 1992  AN 319  Subtle design considerations for Hamming windows  B.H.  
Apr 1992  AN 320  Wavelet synthesis of Walsh functions  B.H.  
May 1992  AN 321  A twocomponent aliasing demonstration  B.H.  
Jun 1992  AN 322  Effects of multiplying sequence by ±1  B.H.  
Jul 1992  AN 323  Sinc interpolation for sample rate changing at irrational frequency ratios  B.H.  
Dec 1992  AN 324  Time aliasing  B.H.  
Feb 1993  AN 325  Time responses of basic RC circuits  B.H.  
Jul 1993  AN 326  A basis for timeresponseinvariant digital filter designs  B.H.  
Nov 1993  AN 327  A new adaptive filter simulation program  B.H.  
Dec 1993  AN 328  An adaptive filter using the TMS320C30  B.H.  
Feb 1994  AN 329  A realtime autocorrelator using the TMS320C25  B.H.  
Oct 1994  AN 330  Properties of reciprocal positions with respect to the unit circle  B.H.  
May 1995  AN 331  An interesting adaptive filter case resulting in a notch response  B.H.  
Aug 1995  AN 332  Weighted, integrated, leastsquared error for FIR filter design  B.H.  
Oct 1995  AN 333  Design and applications of inverse Chebyshev filters  B.H.  EN  
Nov 1995  AN 334  Design and applications of elliptic filters  B.H.  EN  
Dec 1995  AN 335  Lowpass to highpass transformations: Analog and digital approaches  B.H.  EN  
Jan 1996  AN 336  Lowpass to bandpass transformations: Analog and digital approaches  B.H.  EN  
Mar 1996  AN 337  A general review of frequency sampling design  B.H.  EN  
May 1996  AN 338  Multipleorder unit circle zeros and their effect on magnitude response  B.H.  
Sep 1996  AN 339  Frequency conventions for discretetime systems  B.H.  
Nov 1996  AN 340  To views of "leakage" in DFTbased spectral estimation  B.H.  
Dec 1996  AN 341  A simple FIR filter based on an analog prototype using bilinear Ztransform  B.H.  
15 Feb 1997  AN 342  Mathematical considerations relating to equiripple filters  B.H.  
28 Feb 1997  AN 343  A simple equiripple filter obtained by iterating by hand  B.H.  
Sep 1997  AN 344  A "poor mans" samplehold correction obtained by omitting a Butterworth lowpass pole  B.H.  
Oct 1997  AN 345  Improved signal/noise ratio with first order noise shaping: An example  B.H.  EN ECE426  
Feb 1998  AN 346  Mathematical derivations of resampling, compression, and expansion  B.H.  
Apr 1998  AN 347  A simple view of a perfect reconstruction filter  B.H.  
Jul 1998  AN 348  Contrasting sinewave generation in the analog and digital cases  B.H.  EN  
Aug 1998  AN 349  Two pole vs. fourpole filters  The issues  B.H.  EN ECE426  
Nov 1998  AN 350  Linear phase  The term taken outside  B.H.  EN  
Sep 2000  AN 351  Cascading discrete and continuous holds  B.H.  EN  
May 2002  AN 352  Phase errors, amplitude errors, and unwanted sidebands in frequency shifters  B.H.  EN  
Mar 2003  AN 353  A note on the gain and time constant of integrators  B.H.  EN  
May 2003  AN 354  A simple (simplest?) sidetracking filter  B.H.  EN  
Oct 2003  AN 355  Envelope extraction with the Hilbert transform  B.H.  EN  
Oct 2003  AN 356  Spectral recovery for a class of nonuniform ("bunched") sampling  B.H.  EN ECE426  
Nov 2003  AN 357  Consideration for a noise ordinance  B.H.  EN  
Jun 2004  AN 358  Example perfect reconstruction filters  B.H.  EN  
Jul 2004  AN 359  DFT length conversion  B.H.  EN  
Aug 2004  AN 360  Flat and notsoflat spectra  B.H.  EN  
15 May 2005  AN 361  Passive sensitivities and tuning equations  B.H.  EN  
Dec 2005  AN 362  Customized Hamming window with filter design applications  B.H.  EN  
Mar 2006  AN 363  Calculating the bitsaving achieved with noiseshaping  B.H.  EN  
5 Apr 2006  AN 364  Fourier series and DFT  B.H.  EN  
15 Apr 2006  AN 365  Frequency analysis/resolution with few samples  B.H.  EN  
May 2006  AN 366  Unfiltering  Equalization  B.H.  EN  
Jun 2006  AN 367  Some comments on fixedpoint digital oscillator design  B.H.  EN  
Dec 2006  AN 368  Interpolation with a minimum norm polynomial  B.H.  EN  
Feb 2007  AN 369  Two dimensional uniform sampling  B.H.  EN  
Mar 2007  AN 370  Lifting  A third approach to wavelets  B.H.  EN  
Apr 2007  AN 371  A 2D wavelet filtering example  B.H.  EN  
Jan 2008  AN 372  Interpolation error in sinewaves tables  B.H.  EN  
Feb 2009  AN 373  Interpretation of DFT as one frequency sinusoidal waveforms  B.H.  EN  
Aug 2010  AN 374  A view of linear invariant systems  B.H.  EN  
Nov 2011  AN 375  Moving averages and single sinewave cycles  B.H.  EN  
Dec 2011  AN 376  Interpolation of samples on a square lattice  B.H.  EN  
Feb 2012  AN 377  False ideas about random sequences  B.H.  EN  
Mar 2012  AN 378  A program for a flat white noise  B.H.  EN  
Jul 2012  AN 379  Fun plotting your own global warming curves  B.H.  EN  
5 Aug 2012  AN 380  Fun with lighting switches—simple but sometimes frustrating  B.H.  EN  
10 Aug 2012  AN 381  A fun analysis  Instrumentation amplifier  B.H.  EN  
20 Aug 2012  AN 382  Fun with Ohm's law  Maximum power transfer  B.H.  EN  
25 Aug 2012  AN 383  A fun problem Don Lancaster dropped on us years ago  B.H.  EN  
1 Sep 2012  AN 384  Fun with red noise  B.H.  EN  
5 Sep 2012  AN 385  Looking at principal component analysis  B.H.  EN  
1 Oct 2012  AN 386  Fun with a round earth  B.H.  EN  
10 Oct 2012  AN 387  Fun with FFT timing  B.H.  EN  
1 Nov 2012  AN 388  Fun with survey maps  B.H.  EN  
15 Nov 2012  AN 389  Fun with probability puzzles 1 — the Monty Hall problem  B.H.  EN  
20 Nov 2012  AN 390  Fun with probability puzzles 2 — false positives  B.H.  EN  
25 Nov 2012  AN 391  Fun with probability puzzles 3 — the girl named Florida  B.H.  EN  
5 Dec 2012  AN 392  Fun with Reverend Bayes  An overview  B.H.  EN  
10 Dec 2012  AN 393  The Bayes equation denominator  B.H.  EN  
20 Jan 2013  AN 394  Node voltages by superposition  B.H.  EN  
30 Mar 2013  AN 395  Averaging  And endpoint garbage  B.H.  EN  
5 Jun 2013  AN 396  Controlling a lowpass peak gain  B.H.  EN  
15 Jun 2013  AN 397  Clipping: Friend or foe  B.H.  EN  
20 Jul 2013  AN 398  A short presentation of FFT (DFT) interpolation  B.H.  EN  
13 Sep 2013  AN 399  The "Jung trick" applied to a dual OTA  B.H.  EN  
5 Dec 2013  AN 400  Squareroots by hand  B.H.  EN  
22 Dec 2013  AN 401  Yearly moving averages as FIR filters  B.H.  EN  
10 Jan 2014  AN 402  Anomalies in pseudorandom generators  B.H.  EN  
27 Jan 2014  AN 403  Spurious correlation due to filtering (of noise)  B.H.  EN  
13 Feb 2014  AN 404  SavitzkyGolay smoothing  B.H.  EN  
22 Feb 2014  AN 405  Removing "outliers" from averaging  B.H.  EN  
15 Mar 2014  AN 406  Wiener alternative to LMS algorithm  B.H.  EN  
30 Mar 2014  AN 407  Inverting a moving average operation  B.H.  EN  
5 Apr 2014  AN 408  Examples of inverting of smoothers  B.H.  EN  
6 Apr 2014  AN 409  Changing the moving average length  A recipe  B.H.  EN  
6 May 2014  AN 410  Fourier map  B.H.  EN  
20 May 2014  AN 411  DTFT and Fourier series: N equations in N unknowns  B.H.  EN  
25 May 2014  AN 412  More fun with red noise  B.H.  EN  
30 Jul 2014  AN 413  Notch filtering  Some notes  B.H.  EN  
15 Aug 2014  AN 414  Step response from Laplace transform  B.H.  EN  
1 Nov 2014  AN 415  Do random sequences need “improving”?  B.H.  EN  
7 Nov 2014  AN 416  More concerning nonflat random FFT  B.H.  EN  
22 Nov 2014  AN 417  Time domain weighted least squares  B.H.  EN  
10 Dec 2014  AN 418  Fitting a line to a fixed error criteria  B.H.  EN  
26 Dec 2014  AN 419  Finding Chebyshev polynomials  B.H.  EN  
31 Dec 2014  AN 420  Chebyshev as a filter characteristic  B.H.  EN  
7 Jan 2015  AN 421  Matlab programs for Chebyshev  B.H.  EN  
6 Mar 2015  AN 422  Notch filter as a "washed out" comb  B.H.  EN  
27 Apr 2015  AN 423  Exponential decay – continuous and discrete  B.H.  EN  
30 Aug 2015  AN 424  “Cycle11”: In time, frequency, and period  B.H.  EN  
10 Oct 2015  AN 425  Inverting a DTFT ?  B.H.  EN  
15 Nov 2015  AN 426  A DFT curiosity  Investigating bottom up  B.H.  EN  
1 Mar 2016  AN 427  Tweaking a VCO with minimal equipment  B.H.  EN  
10 Jul 2016  AN 428  Why no rangeswitch with hearing  B.H.  EN  
1 Aug 2016  AN 429  Cascading voltage dividers  And friends  B.H.  EN  
27 Sep 2016  AN 430  Feedback and sensitivity  B.H.  EN  
5 Mar 2017  AN 431  Audio volume controls  B.H.  EN  
3 Aug 2017  AN 432  Simplified digital notch filter design  B.H.  EN 
MidMonth + Perspectives
MidMonth letters ran from 1976 to 1978 and then became the broader Perspectives, which ran from from 1979 to 1982.
Date  Issue  Topic  Author  Comments  Web 

5 Nov 1976  MM 70A  Some experiments with VCFs and P/V converters  B.H.  
20 Dec 1976  MM 72A  More on ringing bandpass  B.H.  EN  
20 Jan 1977  MM 73A  Generalised resonators  B.H.  
20 Feb 1977  MM 74A  Digital applications  B.H.  
Improvements to S/N on bucketbrigade delay line circuits  B.H.  
20 Mar 1977  MM 75A  On middle length pseudorandom sequences  B.H.  
The singing voice  B.H.  
Driving the CA3080  B.H.  
Transistor arrays  B.H.  
20 Apr 1977  MM 76A  Does analogue synthesis have a future  B.H.  
An adapting comb filter using charge transfer devices  B.H.  
20 May 1977  MM 77A  Transconductancecontrolled networks  B.H.  Line below equation (8) should read "get rid of the 'B' term....".^{[5]}  
20 Jun 1977  MM 78A  Additional new approaches to analogue music synthesis  B.H.  An appendix to S 14.  EN 
20 Jul 1977  MM 79A  Allpass filters  B.H.  
20 Aug 1977  MM 80A  Possibilities and structures made feasible by electronic music ICs  B.H.  
20 Sep 1977  MM 81A  Some random comments about small electronic music business  B.H.  
20 Oct 1977  MM 82A  Comments on "signal processing aspects of computer music"  B.H.  
20 Nov 1977  MM 83A  The fall 1977 AES convention  Electronic music session  B.H.  
20 Dec 1977  MM 84A  Isolation and unfamiliar subjects  Seamour Solutions  
20 Jan 1978  MM 85A  Selfheating of Q81 resistors  B.H.  
20 Feb 1978  MM 86A  A waveform animating device  B.H.  
Real and imaginary descriptions of the same network  B.H.  
20 Mar 1978  MM 87A  High end compensation of exponential converters  B.H.  
20 Apr 1978  MM 88A  The spectrum of fluctuating musical parameters  B.H.  
20 May 1978  MM 89A  Learning from things that don't work as well, and more on the MPWA  B.H.  Multiphase waveform animator in EN 87  
20 Jun 1978  MM 90A  Concerning the common ground between music and speech synthesis  B.H.  
20 Jul 1978  MM 91A  Two types of fourphase envelope generators  B.H.  
20 Aug 1978  MM 92A  The VOSIM synthesis system  A generalised resonator  B.H.  
Phase shifters as flanging simulators  B.H.  
20 Sep 1978  MM 93A  Formant equalisation as a method of preprocessing for pitch extraction  B.H.  
20 Oct 1978  MM 94A  Matched filtering of pseudorandom sequences  B.H.  
Pink noise by transversal filtering  B.H.  
20 Nov 1978  MM 95A  Coupled resonators for musical synthesis and sound animation  B.H.  
20 Dec 1978  MM 96A  Simple controllers for playing notes "in the cracks"  B.H.  
Jan 1979  P 97A  Principles relating to complexity and control  B.H.  
Feb 1979  P 98A  Principles relating to ranges and regimes of processes  B.H.  
Mar 1979  P 99A  Principles relating to communications between engineers and musicians  B.H.  
Apr 1979  P 100A  More on musician/engineer communication  B.H.  
May 1979  P 101A  What constitutes a musical sound  B.H.  
Jun 1979  P 102A  A view of linear prediction  B.H.  
Jul 1979  P 103A  A view of linear prediction (continued)  B.H.  
Aug 1979  P 104A  A view of adapting filters  B.H.  
Sep 1979  P 105A  Loose ends and random notes: audio work, reverberation, polyphonic systems  B.H.  
Oct 1979  P 106A  An interesting (or at least fun) connection between visual and aural structures  B.H.  
Nov 1979  P 107A  Recent findings on the piano  B.H.  
Dec 1979  P 108A  Music and catastrophe theory (?)  B.H.  
Jan 1980  P 109A  What is an electronic music synthesiser god for?  B.H.  
Feb 1980  P 110A  The value of the live synthesiser  B.H.  
Mar 1980  P 111A  Testing for publication, and looking at network stability  B.H.  
Apr 1980  P 112A  More comments and plans for a further study of animation  B.H.  
May 1980  P 113A  Open problems in animator design and research  B.H.  
Jun 1980  P 114A  Reasonable and unusual alterations to working circuit concepts  B.H.  
Jul 1980  P 115A  More on alterations to working circuit concepts: delay lines with added phase shift  B.H.  
Aug 1980  P 116A  Additional comments on alterations to working circuit concepts  B.H.  
Sep 1980  P 117A  Some comments on some "mystical" phenomena in audio  B.H.  
Oct 1980  P 118A  On the extent of unique ideas  B.H.  
Nov 1980  P 119A  New and interesting books: "Godel, Escher, Bach" and "The flying circus of physics"  B.H.  
Dec 1980  P 120A  Automatic tuning of VCOs  B.H.  
Jan 1981  P 121A  Zeroes of FIR digital filters  B.H.  
Feb 1981  P 122A  Notes on a waveform with a fundamental and even harmonics  B.H.  
Mar 1981  P 123A  Comments on the context in which music is heard  B.H.  
Apr 1981  P 124A  Context for hearing music as supplied by tradition known to the listener  B.H.  
May 1981  P 125A  Review of theories of combfiltered noisepitch  B.H.  
Jun 1981  P 126A  A possible modulation model for delay subtract combfiltered noisepitch  B.H.  
Jul 1981  P 127A  Summary comment on delaysubtract combfiltered noisepitch  B.H.  
Aug 1981  P 128A  Resonant frequency of a soft drink bottle and other acoustic problems  B.H.  EN  
Sep 1981  P 129A  The flute and clarinet  B.H.  
Oct 1981  P 130A  The oboe and trumpet  B.H.  
Nov 1981  P 131A  The violin  B.H.  
Dec 1981  P 132A  The piano  B.H.  
Jan 1982  P 133A  Percussion instruments 1  B.H.  EN  
Feb/Mar 1982  P 134A + P 135A  Percussion instruments 2  B.H.  
Apr 1982  P 136A  Percussion instruments 3  B.H.  
Jul 1982  P 139A  Notes on adaptive filtering 1  B.H.  
Aug/Sep 1982  P 140A + P 141A  Notes on adaptive filtering 2  B.H. 
WebNotes
WebNotes have somewhat arbitrary coverage.
Date  Issue  Topic  Author  Comments  Web 

15 Aug 2009  WN 1  Choice of opamps  B.H.  EN  
17 Aug 2009  WN 2  Recalling Walsh functions  B.H.  EN  
21 Aug 2009  WN 3  4pole extensions  B.H.  EN  
30 Aug 2009  WN 4  Linearity – Use of the term in music synthesis  B.H.  EN  
10 Jul 2012  WN 5  Problems with CFL light bulbs  B.H.  EN  
26 Sep 2012  WN 6  Notes on the intuitive FFT  B.H.  EN  
15 Oct 2012  WN 7  Notes on a "derived" negative supply  B.H.  EN  
10 Dec 2012  WN 8  Still problems with CFLs  B.H.  EN  
24 Dec 2012  WN 9  How the farmer correctly saw Saturn  B.H.  EN  
5 Feb 2013  WN 10  Why engineers (specifically) should be very skeptical of claims of dangerous manmade global warming  B.H.  EN  
22 Feb 2013  WN 11  Peer review  Short comments  B.H.  EN  
7 Aug 2013  WN 12  Another one for the casebook of troubleshooting  B.H.  EN  
27 Aug 2013  WN 13  Fun with grounds and neutrals  B.H.  EN  
2 Dec 2013  WN 14  Compiled Moog stuff  B.H.  EN  
20 Dec 2013  WN 15  The alarming concentration of CO2  B.H.  EN  
21 Dec 2013  WN 16  Those CFL bulbs  Still a joke?  B.H.  EN  
13 Feb 2014  WN 17  Simple illustrations of statistical significance  B.H.  EN  
15 Feb 2014  WN 18  SavitzkyGolay = maximally flat?  B.H.  EN  
15 Sep 2014  WN 19  The difference between allpass and notch  B.H.  EN  
25 Nov 2014  WN 20  Continuing the casebook of troubleshooting  B.H.  EN  
14 Dec 2014  WN 21  Lasting impressions  And other memories  B.H.  EN  
6 Jan 2015  WN 22  Safety first (or at least eventually)  B.H.  EN  
22 Feb 2015  WN 23  Trig identities  Useful for phase shifters  B.H.  EN  
13 Mar 2015  WN 24  Notch filters with real poles  B.H.  EN  
30 Mar 2015  WN 25  A frequencysensitive feedback path example  B.H.  EN  
10 Apr 2015  WN 26  Step response with feedback  Laplace view  B.H.  EN  
3 Sep 2015  WN 27  Fun with power factor correction  B.H.  EN  
6 Nov 2015  WN 28  Fun with world's simplest circuit  B.H.  EN  
25 Jan 2016  WN 29  Jerry Coyne  Reprehensible censor  B.H.  EN  
10 Feb 2016  WN 30  Misplaced security: Passwords and combinations  B.H.  EN  
13 Feb 2016  WN 31  Ohhum  B.H.  EN  
1 Mar 2016  WN 32  You really can't fight city hall  B.H.  EN  
15 Mar 2016  WN 33  Pet peeves  B.H.  EN  
20 Mar 2016  WN 34  Nonphoto blue and related matters  B.H.  EN  
28 Mar 2016  WN 35  Coincidence  B.H.  EN  
7 Apr 2016  WN 36  Engineering license  B.H.  EN  
8 Apr 2016  WN 37  More on "the hum"  B.H.  EN  
11 Apr 2016  WN 38  Notching to try to display "the hum"  B.H.  EN  
27 Apr 2016  WN 39  Calculating/measuring the notch  B.H.  EN  
6 May 2016  WN 40  Current view of my view of "the hum"  B.H.  EN  
18 Jun 2016  WN 41  Brief interruptions of "the hum"  B.H.  EN  
2 Sep 2016  WN 42  The 4pole looked at a bit more  B.H.  EN  
28 Sep 2016  WN 43  Interruption of the hum  Speculation  B.H.  EN  
24 Oct 2016  WN 44  On demodulation and superposition  B.H.  EN  
12 Dec 2016  WN 45  Edge pitch, tinnitus, and the hum  A quick look (and listen)  B.H.  EN  
20 Jan 2017  WN 46  Interruption of the hum  Audio simulations  B.H.  EN  
26 Feb 2017  WN 47  Evidence for internal source of "the hum"  B.H.  EN  
17 Apr 2017  WN 48  Peer review  Less than you suppose  B.H.  EN  
2 Jul 2017  WN 49  Food on the table: Leaving well enough alone  B.H.  EN  
6 Aug 2017  WN 50  Engineers: What you do and what you say  B.H.  EN  
30 Aug 2017  WN 51  Further comment on "the hum"  B.H.  EN  
20 Feb 2018  WN 52  Just the (math) facts  B.H.  EN  
27 Feb 2018  WN 53  Checklist  Typical hum  B.H.  EN  
11 Mar 2018  WN 54  Problems recording the hum  B.H.  EN  
12 Jul 2018  WN 55  A poorman's guide to displaying lowfrequency acoustic hum  B.H.  EN  
29 Jul 2018  WN 56  Histogram of the pitch of the hum: A first look  B.H.  EN  
20 Aug 2019  WN 57  Assuming  Winding down  B.H.  EN  
10 Sep 2019  WN 58  Cascading two identical bandpass filters  B.H.  EN  
17 Oct 2019  WN 59  More on cascading identical bandpass  B.H.  EN  
1 Aug 2021  WN 60  More on "the hum" as LF tinnitus  B.H.  EN  
3 Aug 2021  WN 61  Moog at Cornell  Spring 1971  B.H.  EN 
Musical Engineer's Handbook
Musical Engineer's Handbook written in 1975 is about the theory of analog music synthesis. See Electronotes Newsletter for digital music synthesis.
 Musical scales, Chapter 1e, pp. 35
 Pulse modulation, Chapter 2c, pp. 2022
 Power supply design, Chapter 5j, pp. 110
 Calculation of the poles of 90° phase difference networks, Ch. 6a, pp. 1416
Builder's Guide and Preferred Circuits Collection
Builder's Guide and Preferred Circuits Collection is a collection of the best EN analog circuits up to July 1986. These are circuits suggested for construction.
"Because of the way the BG&PCC has evolved over the years, the style, format, and amount of accompanying text varies from item to item. A few diagrams are included to more or less complete a "Catalog" of circuits, and the accompanying text may begin and/or end midsentence. Most items now include the full, original text, but don't be alarmed by the few that don't."
Other contributors
 Making rack panels by Thomas Henry, 1981, pp. 5357
Notes
 Page 85: One other typographical error in both the ENS73 synth (EN 29 p. 9) and the HBSP: The filter capacitor in the 5V supply should be 10,000 uF not 1000 uF as shown.
 Page 155: Renumber VCFs  5 to 8, 6 to 5, 7 to 6 and 8 to 7
Theory and practice of musical sound synthesis
A guide to creating both familiar and new sounds for music composition, emphasizing basic concepts and how to apply them.
Date  Issue  Topic  Author  Comments  Web 

1980  TOPOMSSCh1  Theory and practice of musical sound synthesis 1.0 – 1.5  B.H.  EN  
TOPOMSSCh2a  Theory and practice of musical sound synthesis 2.0 – 2.1  B.H.  EN  
TOPOMSSCh2b  Theory and practice of musical sound synthesis 2.1 cont.  B.H.  EN  
TOPOMSSCh2c  Theory and practice of musical sound synthesis 2.2  B.H.  EN  
TOPOMSSCh2d  Theory and practice of musical sound synthesis 2.2 cont.  B.H.  EN 
AES
Papers by Bernie Hutchins published in the Journal of the Audio Engineering Society.
Date  Issue  Topic  Author  Comments  Web 

Oct 1973  AES 1  Experimental electronic music devices employing Walsh functions  B.H.  EN  
Sep 1975  AES 2  Application of a realtime Hadamard transform network to sound synthesis  B.H.  EN  
Apr 1975  AES 3  The frequency modulation spectrum of an exponential voltagecontrolled oscillator  B.H.  EN  
Nov 1981  AES 4  Animation  B.H.  EN  
Jan/Feb 1982  AES 5  Adapting delay comb filter  B.H., Walter H. Ku  EN  
Mar 1982  AES 6  Simple hardware pitch extractor  B.H., Walter H. Ku  EN 
Bibliography
Lists of publications.
Date  Issue  Topic  Author  Comments  Web 

Nov 1972  B 1  B.H.  Preliminary bibliography  Part 1 (Initially released as Supplement S 4.^{[6]})  
May 1973  B 2  B.H.  Preliminary bibliography  Part 2  
Nov 1973  B 3  B.H.  Preliminary bibliography  Part 3  
Dec 1975  B 4  B.H.  Bibliography Item B004, Supplement to EN 59
(Initially printed in EN Vol. 7 issues 49  53 and 55, later reissued as B004 with very few updates and additions.^{[6]}) 
Club tapes
There were two club tapes made in the first couple of years of Electronotes, containing demonstrations and compositions from members.^{[7]}^{[8]}
Further reading
 EN 92 pp. 34 & EN 96 pp. 78.pdf  Listing of application notes 1  116 and Master list of Electronotes publications up to Dec. 1978
References
 ^ Master List Of Electronotes Publications, Electonotes 96, Dec 1978, pp. 78
 ^ EN 87 p.21
 ^ ^{a} ^{b} ^{c} ^{d} ^{e} ^{f} ^{g} ^{h} ^{i} ^{j} ^{k} ^{l} ^{m} ^{n} ^{o} ^{p} ^{q} ^{r} ^{s} ^{t} ^{u} ^{v} ^{w} ^{x} ^{y} ^{z} ^{aa} ^{ab} ^{ac} EN 27, pp. 67  The error might not be present in later reissues.
 ^ ^{a} ^{b} EN 91, p. 1
 ^ ^{a} ^{b} ^{c} ^{d} ^{e} EN 86 pp. 34
 ^ ^{a} ^{b} ^{c} ^{d} ^{e} ^{f} EN 81 p.20: B.H. explains how/why S2, S4, S5 & S6 became 'superseded'
 ^ EN 84 p. 3
 ^ EN 86 p. 5
Tim Stinchcombe web pages
 Electronotes Index
 Application Notes index
 Indices of MidMonth Letters, including Perspectives, Webnotes and Bibliographies.
 Supplements index, including Theory and Practice of Musical Sound Synthesis and AES papers.