[sdiy] Envelopes and gates from guitar

David Moylan dave at expeditionelectronics.com
Fri Jun 16 16:47:37 CEST 2023

Note, that the GR-300 doesn't rely on gate signals, only envelopes.  
IMHO, deriving envelopes is not so hard; gates/triggers that trigger but 
don't false trigger or stutter is much more difficult.

On 6/16/23 6:22 AM, brianw wrote:
> Bonjour Didier,
> Schematics are available for the Roland GR-500 and GR-300 synths. Pat Metheny considers the GR-300 to be the best guitar synth ever made. I'd look at the analog section of those schematics. The GR-100 is also interesting - rare, but schematic for it are also available.
> I'd start with the GR-300, and compare the others to see if the envelope followers and gates have any significant differences.
> Brian Willoughby
> On Jun 15, 2023, at 8:59 PM, Didier Leplae wrote:
>> Greetings synth diy list,
>> Does anyone have any good examples of designs or general thoughts pertaining to envelope followers and gates from a guitar signal?
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David Moylan
Expedition Electronics
sonic adventures!

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