Penfold synthesiser
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The Penfold synthesiser is a basic synthesizer based on the circuits described in the Babani book Electronic Synthesiser Construction by R. A. Penfold, published in 1986.
Description
The synthesizer has the usual VCO-VCA-VCF voice, the book also includes an ADSR envelope generator, several simple sequencer circuits and a pseudo-stereo circuit using a simple phase-shift circuit.[1]
Modifications
- 1M for RV101 and RV102
- 2.2uF for C101
- 10k for the volume pot
- Op-amp buffer outputs
- Add a unity gain buffer to the AR
- Use star wiring for the power supply rails instead of daisy chained
See also
References
- ^ Tim Stinchcombe
- ^ RA Penfold LFO, where's 0V rail?, Electro-music.com Forum, Nov 2012
- ^ Penfold synth circuits. LFO affecting VCO even when not connected?!, SOS forum, Jun 2015
External links
Digitised
- World Radio History
- Electronic E-Music DIY Schematics Archive : Synthesizers
- /~rstevew/Public/SoundSynth/00_PenfoldSynth
YouTube
- R.A.Penfold DIY synth by David Hewitt, May 2017
- Home made analogue mono-synth from the R.A.Penfold book "Electronic Synthesiser Construction". by Techno Workbench, May 2012
- Home made analogue mono-synth from the R.A.Penfold book "Electronic Synthesiser Construction". Vid2 by Techno Workbench, May 2012
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