Tim Orr

Tim Orr designed synthesizers for EMS Ltd., Akai and later synthesizer projects for Electronics Today International magazine, sold as kits by Powertran, he then went on to lecture on electronic instrument design at the London College of Furniture.

EMS gear

 * EMS Synthi DKE
 * EMS Synthi E
 * EMS Synthi QUEG
 * EMS Universal sequencer
 * EMS Vocoder 2000
 * EMS-Rehberg Analyse-filterbank B1
 * EMS-Rehberg Synthi-logik

Electronics magazine articles

 * Electronic Sound Synthesizer, with D. W. Thomas, Wireless World, Aug to Oct 1973, Keith Snook, EmusicDIY, World Radio History
 * Active filters, ETI, Jul to Sep 1977, World Radio History
 * Op amps, ETI, Feb to May 1978, World Radio History
 * Spectrum analyser, ETI, Jun 1978, World Radio History
 * Designing oscillators, ETI, Jul 1978, World Radio History
 * Polyphonic keyboard, ETI, Jul 1978, CAG, World Radio History
 * Music Synthesiser, ETI, Jul to Aug 1978, CAG, EmusicDIY, World Radio History
 * Ten 3080 circuits, ETI, Apr 1979, World Radio History
 * Electronic music, Hobby Electronics, May to Jun 1979, World Radio History
 * Transcendent DPX (A String Thing), ETI, Aug to Oct 1979, CAG, World Radio History
 * Analogue delay lines, ETI, Nov 1979, World Radio History
 * Analogue switches, ETI, Apr 1980, World Radio History
 * The Black hole chorus machine), ETI, May 1980, CAG, World Radio History
 * Filter design, ETI, Jul 1980, World Radio History
 * Bandpass and beyond, ETI, Dec 1980, World Radio History
 * Polysynth, ETI, Dec 1980 to Mar 1981, CAG, World Radio History
 * Digital delay effects unit, E&MM, Feb to Mar 1982, Muzines
 * Facts on DAC's and ADC's, ETI, Mar 1982, World Radio History
 * Electromusic techniques, ETI, Apr to Jun 1982, World Radio History
 * Equaliser circuit design, ETI, Sep 1981, World Radio History
 * Semi-professional mixer, Practical Electronics, Oct to Dec 1982, CAG, World Radio History
 * Chorus/flanger unit, ETI, Jan 1984, CAG, SynthDIY.com, World Radio History
 * Powertran MCS-1, with R Monkhouse and Paul Bird, E&MM, Oct 1984 to Mar 1985, CAG, Muzines
 * Powertran BBC MIDI interface, with Jim Grant, E&MM, Apr 1985, Muzines