Envelope generator
An envelope generator is a device that produces an envelope voltage. When it controls a VCA these together form an envelope shaper.[1]
AD envelope generator
The envelope generator is usually triggered by a gate signal from the keyboard.[2]
Usage
For shorter envelopes at higher pitch, as happens in acoustic instruments, a master CV is taken from the same voltage as used for VCO pitch.[3]
See also
References
- ^ Synthesizers for musicians by R A Penfold, PC Publishing, 1989, ISBN 1870775015, p.21
- ^ Synthesizers.com Q109 Envelope Generator
- ^ Description of the Serge Extended ADSR Envelope Generator
External links
- Synth Secrets, Part 3: Modifiers & Controllers
- Synth Secrets, Part 7: Envelopes, Gates & Triggers
- Synth Secrets, Part 8: More About Envelopes
- What are all the ADSR's out there to build? on electro-music.com
Kits
- MFOS ADSR Envelope Generator
- MFOS Dual Attack Release Envelope Generator
- Serge Extended ADSR Envelope Generator
Schematics
Readily available analogue IC and discrete component based
- Formant music synthesizer by C. Chapman, Elektor, 1978, p. 64, using op-amps and common discrete components
- yusynth ADSR has a 555 core with a few op-amps.
CEM IC based
- Digisound 80 80-10 Voltage Controlled Envelope Generator, uses CEM3310. Electronic Music Circuits by Barry Klein,1982, p. 62-3, includes Charles Blakey's independent trigger input modification.
- Digisound 80 80-8 Dual ADSR, uses CEM3310
- Digisound 80 80-18 Dual Multi-Function Envelope Generator, uses CEM3310