[sdiy] Idea: oddly timed envelope gen thingy

[Peter Grenader]

Interesting...two circuits controlled by a single stereo pot.

these values make for a short-ish max time, 25 mf after the 1 megs would
give it better range,,,but I'll pop this together this weekend and see.
interesting idea though.


René Schmitzwrote:

> 
> Hi Peter,
> 
> My attempt would be here:
> http://www.uni-bonn.de/~uzs159/ad2.jpg
> 
> Cheers,
> René
> 
> Peter Grenader wrote:
>> Excuse the rather complicated title of this post.  I prersent to you the
>> first annual SDIY design challenge competition.  First one who does it gets
>> something.
>> 
>> ...wondering if anyone has ever made anything that does what I'm wishing for
>> right now:
>> 
>> A Beer Generator.  You put a pulse in, and....
>> 
>> kidding.
>> 
>> What I am wanting is an envelope that has two outputs.  One just boilerplate
>> AR, and the other which is attack only that is exactly timed so that
>> whatever length is dialed into the combined attack and decay, the A only
>> output will give an attack which last exactly as long as that combined A/R
>> time constant.
>> 
>> What I am wanting this for is (I think) fairly obvious.  You have an
>> amplitude envelope gating a sound and you want that sound to be swept
>> through a filter that is constantly rising, even when its amplitude is
>> fading out.  This is easy with careful settings of two envelopes, but how
>> about when you want to vc the overall length of the amp envelope so each
>> sounding is slightly different.  then this set-up become complicated so it
>> will work right in every instance.  t'would be nice if there was a jack that
>> just gave you that constant rise.
>> 
>> I think it would be (fairly) easy.  The output of the AR envelope internally
>> wired through a comparator, with a lag at it's output, right?  Yes, it could
>> be done using tow modules that do these functions- but why tie them up for
>> this I say?
>> 
>> somebody should work on this (for me).  Jim Patchell, Magnus and JH are
>> great candidates for this as their designs are terrific.
>> 
>> guys?
>> 
>> seriously - has anyone ever done this?
>> 
>> lemme know and thanks,
>> 
>> Peter
>> 
>> 
>>