I'm just starting to design a modular synth and i have a beginners question. Is it possible to use an Audio signal as a control voltage? Essentially all I want is to be able to use a standard oscillator as a modulator to control cutoff frequency, like you can do on the Pro-1 or EMS synth. I presume it is possible, but I realize that Audio is AC voltage and CV is DC voltage. So is it safe to mix these signals? Maybe someone brave can just try it and see if it works...