[sdiy] good for VCAs?

[eq927 at freenet.carleton.ca]

Hi Fernando,
The design can be used as is. It would be a good idea to put a resistor 
of a few hundred ohms on the audio output to ensure stability when 
driving cables - output configurations for accomplishing this were 
discussed on the list a few weeks ago. It can handle +/- 12.5 V max on 
the audio input, it is DC-coupled as shown, and  can process audio or 
DC. You might want to add additional 100K resistors for multiple CV 
inputs. For best results use a low-offset op amp like the OP-07 for the 
op amp that processes the control voltage. The CV input is set up for 
+15V as shown - it will give unity gain with 10 V if you replace the 
100K CV input resistor with a 66K5 resistor (or use 68K).
Regards, Mike