[sdiy] Sliders and envelopes

[JH.]

That was my problem exactly when I built my "Minotaurus", and wanted to 
emulate the Moog Taurus envelopes with a small range of potentiometer values 
I had available.
The result can be found here:
http://home.debitel.net/user/jhaible/jh_minotaurus_1.pdf
I guess that's some kind of resistance multiplier I've devolopped here, back 
then - and it actually works, indeed! - but it's a more involved solution 
than a good VC envelope could ever be, so except as for an excercise of 
emulating a given, vintage circuit, it's pretty useless ...

JH.

----- Original Message ----- 
From: "Maarten Halmans" <halmans at home.nl>
To: <synth-diy at dropmix.xs4all.nl>
Sent: Saturday, January 03, 2009 10:50 PM
Subject: [sdiy] Sliders and envelopes


I would like to build an envelope generator with Alps sliders, I can only
get these sliders in 10k log or 50k lin. Is it possible to get normal times
(something between 1 millisecond and  10 seconds) for the attack, decay and
release stages without using a large timing capacitor? Of course I could go
for a voltage controlled envelope generator, but than a lot more components
are involved and I am not specifically looking for voltage control of these
parameters.
Any ideas?
Thanks,
Maarten

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