vc adsr

[Beszedes Arpad]

Hi!
Thanks for everyone who replied about vc-adsr. I am collecting various
possibilities and will buid some test-circuits. If I decide which to
chose, I will share my experiences with other diy-s!

Using LDRs with LEDs sounds cheap, but how much is it linear and
wide-range?
I like the idea of using OTAs as current sources (maybe CA3080, beacuse
it's cheaper than the LM13600), the problem is that to use it as a
general vc-resistor (floating) it needs 2 opamps, so the circuit could
be too complex (and expensive).

Regards, Arpad.

-- 
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*  Arpad Beszedes                             *
*                                             *
*  Research Group on Artificial Intelligence  *
*  Hungarian Academy of Sciences              *
*  Attila Jozsef University, Szeged, Hungary  *
*  e-mail: beszedes at cc.u-szeged.hu            *
*  tel.: (+36) 62/45-41-45                    *
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