[sdiy] delayed envelopes

[Nicholas Keller]

Not sure if I'm imagining these issues, but I think if you played legato but wanted delayed vibrato (assuming that's the goal) on every note, your vibrato would carry over as the audio would be constant, therefore no new delay period.  Also, with an audio delay-based control of the envelope follower, your actual VCA envelope would end before the vibrato fell to zero.  This could be good or bad, as you may want the vibrato to be 100% for the VCA release instead of fading with the audio.  But with long delay and little time between notes, your new note could have vibrato right away from the last note played.  

It's essential, at least for delayed vibrato, to have the option to have note off simultaneously affect both the VCA EG and the vibrato finale. 

I asked some time ago about envelope circuits with a pre-attack HOLD stage and got some good suggestions.  I had assumed that was basically how the BMC Delaying AR would operate, where a single note on/off message would be sent to both the VCA EG and the HADSR controlling the vibrato VCA, so note off would end the vibrato effect (adjustable with the HADSR's release stage) 

Am I missing something? 

Nick


> On Nov 7, 2014, at 1:13 AM, Paul Perry <pfperry at melbpc.org.au> wrote:
> 
> If I had to make a delayed envelope, I'd be tempted to use an
> audio delay and an envelope follower.
> 
> Take an envelope, use it to control a VCA and a steady tone,
> then run the modulated envelope into an audio delay or echo stompbox,
> and then off to the env follower & you are done.
> 
> Sounds messy.. but, if you have the modules, it opens up a very wide range of
> possible envelope shapes.
> 
> paul perry Melbourne Australia 
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