Quad VCA / Mixer

Quad VCA / Mixer

This is hi-quality Quad VCA-Mixer. I used maybe best available VCA chips THAT2180 and OPA2604 in audio chain, TL074 for CV.

4 identical VCAs and mixer to mix channels in pairs and all together, each channel has separate out too.

VCAs feed both AC or DC signals.

Response curve is in the middle between exponential and linear. Changing one resistor per VCA can change this curve if someone want.

http://www.l-1.su/QuadVCA.html