AW: [sdiy] LM13600/13700 VCA circuit recommendations

[Matthias Herrmann]

what about rays? you may have seen them already (not quite that simple):
http://www.musicfromouterspace.com/analogsynth/DLLVCA001/DLLVCA001.html
http://www.musicfromouterspace.com/analogsynth/newdualvca.html

matthias




-----Ursprungliche Nachricht-----
Von: owner-synth-diy at dropmix.xs4all.nl
[mailto:owner-synth-diy at dropmix.xs4all.nl]Im Auftrag von Dave Kendall
Gesendet: Montag, 28. August 2006 20:55
An: synth-diy at dropmix.xs4all.nl
Betreff: [sdiy] LM13600/13700 VCA circuit recommendations


Hi All.

I recently scored a couple of tubes of these ICs cheap from Evilbay, and am
looking for simple VCA designs. Found a couple so far;
Scott Bernadi's one for routing CVs,
http://home.comcast.net/~sbernardi/elec/og2/og2_dual_linear_vca.html
or maybe LM13600 VCA *2 from Jorgen Bergfor's VCA shootout
http://hem.bredband.net/bersyn/VCA/lm13600%20vca%202.htm
 - doesn't say if it's Linear or expo response to CV though, and I can't
work it out from the schemo....

Has anyone built these or got any comments on these designs? I'm looking for
simple designs, one linear for CV, and one expo for audio, that don't have
to be *mega* quiet or feature rich. They'll be part of a routing matrix in a
fixed architecture synth that (one day) will see the light of day.....

Any comments on these or other designs would be most welcome.

cheers,

Dave