In general, there is no fundamental difference between audio and CV, both are just voltages. What makes them one or the other is the receiving end. E.g. there is not much use in listening to 1V of DC, but add that voltage to the 1v/Oct input of a VCO and it will play one octave higher. Avoid patching together OUTs of modules that produce a voltage. Other than that I , go ahead and try. When unexpected things happen, unplug and try to figure out what's happening. Also, read up on the manuals when you're stuck. It might help ;-)