[sdiy] Dynamic mixing

[Darren Reid]

Hi all!

I have a half-baked idea for a circuit, and I'm looking for design
pointers...

I have several "distortion" circuits. I wish for an audio input to be mixed
through these distortion circuits dynamically, perhaps based on RMS or an
envelope. The sort of effect I'm looking for is like this:

Say there are 4 distortion circuits, D1-D4.

If a soft sound appears at the input, the percentage of the signal at the
output is based on:
50% D1
25% D2
15% D3
10% D4

If a loud sound appears at the input, I want more along the lines of:

10% D1
15% D2
25% D3
50% D4

These percentages, and the scaling, are all just for example. I want to play
with lotsa different things in there; what I'm looking for is general hints
on the direction to look in.

Also, can I tap into the four pieces of an ADSR envelope individually?  For
example, could I make an ADSR where A, D, S, and R all control different
VCA's? Then I could map A->D1, D->D2, S->D3, R->D4 etc.

-Darren


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