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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 op-amp, not the dual 555 timer. Any op-amp 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, fan-out 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, Non-Such Guide, Switched-On 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 1-3: 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. 47-51
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.
  • pg. 7, line 7 of 8d; should read the "1” level, the "0" and "1" corr......[3]
  • pg. 8, line 11, word 11 should read minus (see En 13, pg.13, 8d)[3]
  • pg. 8, line 22, should read voltage controlled amplifier (not oscillator)[3]
10 Oct 13 1 Frequency modulation - Applications B.H.
  • Pg. 3, correction in EN 19, pg. 1[3]
  • pg. 3, Example: line 1, should be 1000Hz (not 100Hz)[3]
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 Phase-locked loops 1 B.H.
  • pg. 1, line 11 should read 50¢ (not 40¢) you may have gotten a bargin![3]
  • pg. 3, upper diagram; strike "exponential" from "exponential VCO"[3]
4 Reader's equipment: Keyboard S&H, duophonic keyboard D. Rossum
6 Composition B.H.
6 Literature review: NE560-567 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 sample-and-hold 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 (PWG-2), 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 Non-harmonic 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, non-linear 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 (ENS-73) 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 ENS-73, part 1: The overall system and VCO options B.H.
15 Oct 29 1 Presentation of the ENS-73, part 2: The minimal operational setup (ENS-73-MO) D. Rossum BG&PCC p. 145 and MEH 5c p.9 VCA
5 Nov 30 2 Presentation of the ENS-73, 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 ENS-73, 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 ENS-73, 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 ENS-73 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 point-by-point waveform generator Hal Chamberlin
8 b) The digital divider in music synthesis John A. Ball
13 c) An all-digital 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 ENS-73 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 ENS-73: 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 DS-2 and APR 2600 mods, 360 systems, new EMU sub-modules B.H.
5 ENS-73: 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: ENS-73 keyboard interface B.H.
2 Fourier series waveform generator, part 1 Hal Chamberlin
6 Reader's ideas: PNP/NPN pairs, converting triangle-sine, 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 multi-talented LM309 regulator Craig Anderton
15 Non-uniform 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 low-pass 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 simple-minded 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 ENS-74 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 ENS-74 home built synthesiser, part 2 (VCOs) B.H. MEH, Ch. 5b, p.23
5 Reader's equipment: Location modulation with two co-ordinate 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 (A-F) 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 (G-R) 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 ENS-74 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: ENS-74 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 (S-Z & 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 (ENS-74) B.H.
4 A minicomputer-controlled music synthesiser Michael R. Abram
7 Reader's equipment: VCO Paul Titchener
9 Selection of op-amps 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 Voltage-controlled 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. 5-10
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 Voltage-controlled 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 voltage-controlled 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 ENS-76 home-built 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 Voltage-controlled 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 scanning-type 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 ENS-76 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 ENS-74 keyboard interface unit Ian Fritz
13 The ENS-76 homebuilt synthesiser system - Part 3; utility VCO B.H. Schematic in BG&PCC p. 117
16 Comments on the triangle-to-sawtooth conversion problems W. M. Hartmann
18 An eight-bit pseudo-random 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: Non-linear transfer function B.H.
8 Project ideas: Quantisers B.H.
10 The ENS-76 homebuilt synthesiser system - Part 4: Instalment on the digital keyboard B.H. BG&PCC p. 88. Not velocity-sensitive.
20 Modifications to the Electronotes low-pass 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 piecewise-linear technique of electronic music synthesisers E.D.Cooper
13 Applying the CA3140 op-amp 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 ENS-76 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 ENS-76 homebuilt synthesiser system - Part 6 (VCF 3, timbre modulator 1, delay 1) B.H. BG&PCC p. 166, p. 173, 255 EN pp. 14-16
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 ENS-76 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 ENS-76 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, "Trans-Europe Express" by Kraftwerk Craig Anderton
Jun 78 3 Synthesis procedures for musical sounds - Part 1 B.H.
11 Re-evaluating 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 voltage-controlled 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 triangle-to-sine 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 ENS-76 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 frequency-to-voltage converter for use with pitch-to-voltage conversion devices Robert Iodice
9 An odd-harmonic to even-harmonic 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 voltage-controlled filters B.H. EN
5 1. Corner peaking of a four-pole 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 second-order envelope-transient 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, op-amp 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 quasi-digital Bi-N-Tic 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 cascaded-monostable 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 fine-structure 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 voltage-controlled 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 1972-1978 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 square-wave frequency-division sub-octave cross-product 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: Sample-and-hold droop, VCA feedthrough B.H.
3 A fourth order state-variable 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 state-variable 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 vocal-effects waveform animator: The synthesis of "animated" sound - Part 4 B.H. BG&PCC p. 262 EN
Jul 103 2 A vocal-effects 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: Pseudo-random tone-wheel B.H.
Sep 105 2 Reader's questions: Finding patents, blown LF351s B.H.
3 The effects of feedback on four-pole filters with differing pole frequencies B.H.
Oct 106 3 A pseudo-random tone-wheel 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 four-quadrant 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 self-modulating VCO, revisited B.H.
6 Multi-phased waveform animator with reduced part count and two extensions L. Ludwig EN
9 A new look at pulse-width 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 pulse-width 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 state-variable type configurations B. Hutchins, Norman Rose
10 E: Simple voltage-controlled amplifier with 4009 CMOS chip Mike Yantis
12 F: Body-proximity controllers for voltage-controlled synthesisers John Valente
13 G: Frequency halver for triangle and sine waves B. Hutchins, Iggy Foulke
14 H: Some unusual high-Q circuits B. Hutchins, Tom La Mar
19 I: Controlled-current switching oscillator Ian Fritz EN
20 J: Simulated waveform generation with a programmable calculator B. Hutchins, Allen Eaton
21 K: Sync circuit for ENS-76 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 variable-slope 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 shift-register sequences: B.H.
Jul 114 3 Four voice digital keyboard interface Bob Chidlaw
9 Spectra of some dual-pulse waveforms B.H.
Jul 115 1 Time reversing oscillators and through zero FM B.H. EN
3 A 39-channel variable-Q 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 39-channel variable-Q filter bank - Part 2 B.H.
Sep 117 1 Reader's questions: Paralleling OTAs B.H.
3 A delay-line/phase-shifter 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 pulse-width 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 pitch-to-voltage 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 pseudo-random 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 triangle-to-sine 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, band-pass filter orders, IC sockets B.H.
3 Lab notebook - More tests of triangle-to-sine converters B.H.
4 Newcomer's page - Pitch B.H.
5 Pitch, filtered noise, suggested experiments B.H.
9 A few more variable-slope ideas Normand Provencher
14 Browser's report Normand Provencher
15 Review of recorded music Craig Anderton
17 Book reviews B.H.
19 An add-on sub-octave 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 three-octave 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 square-law attenuator Normand Provencher
7 A new self-varying 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 through-zero 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 band-pass resonator B.H.
Sep 129 2 Newcomer's page - Getting publications B.H. EN
3 A VCO with through-zero 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. Flip-flop unit B.H.
6 4. Output filters for tape recording B.H.
7 5. Headphone-speaker amplifier/attenuator B.H.
8 6. Comparator/differencer/rectifier unit B.H.
9 7. Ramp generator/oscillator B.H.
10 8. DC source/ultra-fine tuner B.H.
11 Possible new electronic musical instrument based on self-sustained 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: Op-amp 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 Tri-coloured 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 two-stage 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 triangle-to-sine converter using a 1496-type 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 variable-slope 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 all-pass 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 four-pole 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 information-bearing signals for pitch-changing, time-base 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 second-order digital oscillator B.H.
Jul 91 178 1 Two roads to narrow-band chaos B.H.
3 Narrow-band 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 least-square and min-max 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 piecewise-constant and piecewise-continuous 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 Up-boxes and down-boxes - 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 discrete-time filters B.H.
12 Time-domain zero-padding 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 min-max polynomial-fitting 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 state-variable 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 second-order time overshoot: A second-order 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 Sallen-Key low-pass 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 Sample-rate changing by polyphase on demand B.H. EN
17 Recovery from bunched sampling B.H.
Dec 2010 206 1 Negative frequencies and through-zero 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 pseudo-random noise sequences
Jan 2013 213 1 Musical scales revisited B.H. EN
30 Beating revisited
Feb 2013 214 1 Compensation of circuit blocks for op-amp 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 - Pulse-width modulation B.H. EN
Sep 2013 217 1 What about: Self-frequency-modulation 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 Time-series smoothing - A review B.H. EN
Feb 2015 224 1 Variable-slope 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 op-amp in electronic music B.H. pg. 7, Equation near top right Q =∆/f0 should read Q = f0/∆[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 pp10-14; 'Pt 1' is EN 6 pp2-5 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 voltage-controlled digital electronic music systems considerations – with EN 16 B.H., Tom Wells, Simon Benlevy
  • pg. 4, 16th line from bottom; EN 51 should read EN 15[3]
  • pg, 7, Step 2: and Step 3:; Appropriate lines should read: Repeat for r = 1,2,3,.......2m (not just m, but 2m)[3]
  • pg. 13, lines 13 and 14; should read ....every eighth harmonic .... .... The fourth sinewave harmonic ....[3]
  • pg. 18, diagram; 11 keys should read 12 keys[3]
 EN
Apr 1973 S 9 Scales of 1 to 49 tones B.H.
Apr 1974 S 10 Starting to use a voltage-controlled 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 ENS-73 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, voltage-controlled and delay line networks:
  • Ch 1 Ideal op-amps and basic op-amp circuits
  • Ch 2 Initial experiments with real op-amps
  • Ch 3 s-plane analysis techniques and active filters
  • Ch 4 Characterization of active filter responses
  • Ch 5 Low-pass active filter examples and experiments
  • Ch 6 High-pass, band-pass, all-pass and notch filters
  • Ch 7 State-variable and voltage-controlled filters
  • Ch 8 Discrete-time filtering with delay line networks
 B.H. EN
Aug - Dec 1977 S 17 Literature evaluation LE-1 - LE-10 B.H.
Aug 1979 S 18 TI-59 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 op-amps 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 second-order low-pass filters B.H.
25 Sep 1976 AN 8 Design of fourth-order low-pass 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 state-variable 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 voltage-controlled 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 voltage-controlled resistor B.H.
25 Jan 1976 AN 24 Overdriven, saturating, and switching applications of the CA3080 B.H.
4 Feb 1977 AN 25 Low-Q 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 op-amp multivibrator circuit B.H.
5 Mar 1977 AN 29 Simple sine-wave 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 High-Q bandpass filter B.H.
11 May 1977 AN 38 High-Q bandpass filter example B.H.
18 May 1977 AN 39 Design of second-order high-pass filters B.H.
25 May 1977 AN 40 Design of fourth-order high-pass 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 - S-plane case B.H.
11 Jul 1977 AN 46 Graphical determination of phase response B.H.
18 Jul 1977 AN 47 Graphical relationships in the Z-plane B.H.
25 Jul 1977 AN 48 Z-plane graphical relationships for first-order systems B.H.
4 Aug 1977 AN 49 Z-plane graphical relationships - A second-order example B.H.
11 Aug 1977 AN 50 Discrete time all-pass networks B.H.
18 Aug 1977 AN 51 Discrete time notch filters B.H.
25 Aug 1977 AN 52 Relationships for higher-order 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 R-filters B.H.
25 Sep 1977 AN 56 R-filter method of op-amp 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 Low-passed square wave - Time analysis B.H.
18 Nov 1977 AN 63 Low-passed 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 triangle-square 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 Multi-mode filter based on first-order low-pass B.H. EN
25 Jan 1978 AN 72 The twin-T filter B.H.
4 Feb 1978 AN 73 Multi-phase 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 op-amps B.H.
4 Apr 1978 AN 81 TI-59 program for high-ripple Chebyshev poles B.H.
11 Apr 1978 AN 82 Data for high-ripple 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 op-amp parameters: Open-loop gain B.H.
11 May 1978 AN 86 Measuring op-amp parameters: Input error values B.H.
18 May 1978 AN 87 Measuring op-amp parameters: Output drive limitations B.H.
25 May 1978 AN 88 Measuring op-amp parameters: Input resistance, CMRR B.H.
4 Jun 1978 AN 89 Measuring op-amp parameters: Bandwidth limitations B.H.
11 Jun 1978 AN 90 Resonant peaking in second-order filters B.H.
18 Jun 1978 AN 91 DC gain of state-variable filters B.H.
25 Jun 1978 AN 92 Three ways to partial fractions B.H.
4 Jul 1978 AN 93 Logic decisions with op-amps B.H.
11 Jul 1978 AN 94 N or more of M - Op-amp logic B.H.
18 Jul 1978 AN 95 AC amplifiers with op-amps B.H.
25 Jul 1978 AN 96 TI-59 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 TI-59 program for the "Deliyannis" bandpass filter B.H.
25 Aug 1978 AN 100 Op-amp 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 Second-order 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 z-transformed 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 TI-59 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 state-variable filters B.H.
11 Dec 1978 AN 114 A frequency-to-voltage converter B.H.
18 Dec 1978 AN 115 Triangle-to-sine converters using nonlinear shapers B.H.
25 Dec 1978 AN 116 Triangle-to-sine conversion based on power series B.H.
4 Jan 1979 AN 117 Transversal digital filter demonstration program for TI-59 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 Full-wave rectifiers B.H.
5 Feb 1979 AN 121 A state-variable 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 lock-in detector circuit B.H.
25 Mar 1979 AN 127 Applying the lock-in detector B.H.
5 Apr 1979 AN 128 A semiautomatic CA3080 selection scheme B.H.
15 Apr 1979 AN 129 Touch-controlled switches - 1 B.H.
25 Apr 1979 AN 130 Touch-controlled 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 Control-voltage test sequencer B.H.
15 Jun 1979 AN 136 An op-amp supply based on a 12.6V filament transformer B.H. BG&PCC p. 83
25 Jun 1979 AN 137 A switched capacitor state-variable filter B.H.
4 Jul 1979 AN 138 Applying the multiple-feedback infinite-gain low-pass filter B.H.
11 Jul 1979 AN 139 Catalogue - Second-order step response B.H.
18 Jul 1979 AN 140 The measurement of phase B.H.
25 Jul 1979 AN 141 TI-59 - PC-100A 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 TI-59 program for second-order bilinear-Z low-pass 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 - Non-integer 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 Second-order frequency response B.H.
15 Dec 1979 AN 157 Second-order 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 Correlation-cancellation loops - 1, basics B.H.
25 Jan 1980 AN 162 Correlation-cancellation loops - 2, experimental circuit B.H.
5 Feb 1980 AN 163 Correlation-cancellation loops - 3, loop with quadrature reference B.H.
15 Feb 1980 AN 164 Correlation-cancellation loops - 4, additional comments B.H.
25 Feb 1980 AN 165 90° phase-difference networks - Basics and data B.H.
4 Mar 1980 AN 166 90° phase-difference networks - Use of phase shift sections B.H.
11 Mar 1980 AN 167 90° phase-difference networks - Second-order all-pass networks - 1 B.H. EN
18 Mar 1980 AN 168 Second-order all-pass networks - 2 B.H.
25 Mar 1980 AN 169 Second-order all-pass networks - 3 B.H.
5 Apr 1980 AN 170 Second-order all-pass 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 low-pass 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 op-amps B.H.
15 Jun 1980 AN 178 Basics - Op-amps B.H.
25 Jun 1980 AN 179 Basics - Op-amps - 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 Second-order low-pass 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 State-variable input-notch structure B.H.
4 Sep 1980 AN 187 State-variable output-notch structure B.H.
11 Sep 1980 AN 188 The bootstrapped twin-T 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 almost-flash A/D converter B.H.
18 Jan 1981 AN 203 Four-quadrant 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 op-amps: 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 Third-order low-pass with unity-gain follower B.H.
4 May 1981 AN 215 A simple mid-range booster B.H.
11 May 1981 AN 216 Bench loudspeaker amplifier with op-amps B.H.
18 May 1981 AN 217 Phase-locked loops - 1 B.H.
25 May 1981 AN 218 Phase-locked loops - 2 B.H.
5 Jun 1981 AN 219 Phase-locked loops - 3 B.H.
15 Jun 1981 AN 220 Phase-locked loops - 4 B.H.
25 Jun 1981 AN 221 Phase-locked loops - 5 B.H.
4 Jul 1981 AN 222 Working with finite gain-bandwidth-product op-amps - 1, amplifiers B.H.
11 Jul 1981 AN 223 Working with finite gain-bandwidth-product op-amps - 2, Sallen-Key filters B.H.
18 Jul 1981 AN 224 Working with finite gain-bandwidth-product op-amps - 3, NFIG filters B.H.
25 Jul 1981 AN 225 Working with finite gain-bandwidth-product op-amps - 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, low-level 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, non-inverting 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 Fourier-series 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 TI-59 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 op-amp 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 bilinear-Z method - 1 B.H.
5 Mar 1981 AN 247 The prewarp problem in bilinear-Z method - 2 B.H.
20 Mar 1982 AN 248 The prewarp problem in bilinear-Z 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 TI-59 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 TI-59 Program for H|(z)| based on FIR filter taps B.H.
5 Jul 1982 AN 255 TI-59 Program for H|(z)| without factoring B.H.
20 Jul 1982 AN 256 TI-59 Program for T|(s)| without factoring B.H. EN
5 Aug 1982 AN 257 Op-amp 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 TI-59 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 TI-59/PC100A B.H.
20 Nov 1982 AN 264 Bilinear Z-transform 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 second-order 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 second-order 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 Small-scale 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 low-frequency quadrature digital oscillators B.H.
Aug 1991 AN 314 Additional quadrature oscillator methods B.H.
Nov 1991 AN 315 Least-squared error filter design B.H.
Dec 1991 AN 316 Least-square filters for non-integrator delay and interpolation B.H.
Jan 1992 AN 317 Polynomial fitting for sample-rate changing at rational and irrational frequency ratios B.H. EN
Feb 1992 AN 318 Time domain least-squared low-pass 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 two-component 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 time-response-invariant 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 real-time 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, least-squared 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 Low-pass to high-pass transformations: Analog and digital approaches B.H. EN
Jan 1996 AN 336 Low-pass to band-pass 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 Multiple-order unit circle zeros and their effect on magnitude response B.H.
Sep 1996 AN 339 Frequency conventions for discrete-time systems B.H.
Nov 1996 AN 340 To views of "leakage" in DFT-based spectral estimation B.H.
Dec 1996 AN 341 A simple FIR filter based on an analog prototype using bilinear Z-transform 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" sample-hold correction obtained by omitting a Butterworth low-pass 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. four-pole 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?) side-tracking 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 non-uniform ("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 not-so-flat 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 bit-saving achieved with noise-shaping 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 fixed-point 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 low-pass 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 Square-roots 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 pseudo-random generators B.H. EN
27 Jan 2014 AN 403 Spurious correlation due to filtering (of noise) B.H. EN
13 Feb 2014 AN 404 Savitzky-Golay 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 non-flat 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 “Cycle-11”: 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 range-switch 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

Mid-Month + Perspectives

Mid-Month 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 bucket-brigade delay line circuits B.H.
20 Mar 1977 MM 75A On middle length pseudo-random 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 Transconductance-controlled 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 All-pass 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 Self-heating 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. Multi-phase 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 four-phase 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 pre-processing for pitch extraction B.H.
20 Oct 1978 MM 94A Matched filtering of pseudo-random 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 comb-filtered noise-pitch B.H.
Jun 1981 P 126A A possible modulation model for delay subtract comb-filtered noise-pitch B.H.
Jul 1981 P 127A Summary comment on delay-subtract comb-filtered noise-pitch 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 op-amps B.H. EN
17 Aug 2009 WN 2 Recalling Walsh functions B.H. EN
21 Aug 2009 WN 3 4-pole 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 man-made 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 Savitzky-Golay = maximally flat? B.H. EN
15 Sep 2014 WN 19 The difference between all-pass 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 frequency-sensitive 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 Oh-hum 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 Non-photo 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 4-pole 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 poor-man's guide to displaying low-frequency 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.

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 mid-sentence. 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. 53-57

Notes

  • Page 85: One other typographical error in both the ENS-73 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 TOPOMSS-Ch1 Theory and practice of musical sound synthesis 1.0 – 1.5 B.H. EN
TOPOMSS-Ch2a Theory and practice of musical sound synthesis 2.0 – 2.1 B.H. EN
TOPOMSS-Ch2b Theory and practice of musical sound synthesis 2.1 cont. B.H. EN
TOPOMSS-Ch2c Theory and practice of musical sound synthesis 2.2 B.H. EN
TOPOMSS-Ch2d 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 real-time Hadamard transform network to sound synthesis B.H. EN
Apr 1975 AES 3 The frequency modulation spectrum of an exponential voltage-controlled 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 B-004, Supplement to EN 59

(Initially printed in EN Vol. 7 issues 49 - 53 and 55, later reissued as B-004 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

References

  1. ^ Master List Of Electronotes Publications, Electonotes 96, Dec 1978, pp. 7-8
  2. ^ EN 87 p.21
  3. ^ 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. 6-7 - The error might not be present in later re-issues.
  4. ^ a b EN 91, p. 1
  5. ^ a b c d e EN 86 pp. 3-4
  6. ^ a b c d e f EN 81 p.20: B.H. explains how/why S2, S4, S5 & S6 became 'superseded'
  7. ^ EN 84 p. 3
  8. ^ EN 86 p. 5

Tim Stinchcombe web pages

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