[sdiy] Idea: oddly timed envelope gen thingy

[René Schmitz]

Hi Peter,

Thanks!

I think there could be a couple tweaks, especially on component values. 
I just picked them out of the blue. But its a start. Maybe its even 
better to make the cap of the lower subcircuit slightly larger to avoid 
the attack-only output to go to its decay phase prematurely.
Also it would be possible to derrive the reset pulse for the lower 
flip-flop from the top output.

Cheers,
  René


Peter Grenader wrote:
> 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
>>>
>>>
>>>
> 
> 
> 
> 

-- 
uzs159 at uni-bonn.de
http://www.uni-bonn.de/~uzs159