[sdiy] Adding offset to vactrol??

[Grant Richter]

>
> I'm not sure I follow you there - vactrols just don't respond very  
> fast; that's part of their charm. Also, for different audio input  
> frequencies, the response time seems to be different, so as you  
> close down on the vactrol you can get an interesting ringing  
> effect. At least that's what it sounds like to me. I think Peter  
> Grenader has written about that, and if you search for the sound  
> file examples of his Plan B version of the Buchla LPG you can hear  
> examples of it.
>

Vactrols do a very complex math operation called "convolution". They  
complexly combine their pulse response with the input control signal.  
The ear seems to like or recognize this.

This link to a DSP site explains deconvolution in regards to a gamma  
detector response, but the same idea applies to Vactrols (IMHO).

http://www.dspguide.com/ch17/2.htm