hi,

I found my Chorosynth, a vco,vca monophonic synth I built in the early 
80's. The schematic and pcb were on the Elektor magazine, and found  the 
article in French from the net. The board is bit suffered, there are two 
cracks, some ICs are missing, but they're just cmos dividers and nands.

I'm thinking controlling it with Arduino: sending from csound with 
serial opcode commands and notes. I've found simple PWM-DAC for Arduino, 
which could control the voltages, and Arduino has lots of I/O-pins to 
control the switches in Chorosynth. Output is pure analog, don't have 
other mixer than Tascam Porta-1,dates also the early 80's.
Sending audio from csound on one computer, mixing the synth output and 
recording with other computer, then doing all kinds of processing with 
csound.

Are there any other old timers on the list familiar with Chorosynth? It 
created quite natural chorus effects and also violin, cello and other 
string instruments. Real synth with adsr, lfo, vca and vco's with even 
portamento to vco's. The keyboard was etched on pcb and playing was 
touching the key with a stylus.

Retro is back!

-matti