[sdiy] positive/negative envelopes...

[Duane R Balvage]

Hello all-

Anyone have an idea how to implement positive/negative going envelopes from a positive
envelope with one pot and one op-amp?

I would like to put in a control that works like this:



           neg    0    pos
           ---/\/\/\/\---     VCF Env amt
                  |
		  |
                 

See what I am saying?

I'm pretty sure this is possible, I just can't remember how to do it....

			-Duane



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