[sdiy] modular synth "standards"

[Tony Clark]

> So, what else?   What are "typical" p-p audio signal levels in the system?

   Probably something like +-5V audio 0-10V CV, or all +-5V or all 
0-10V.  I like the first scheme, really, symmetrical audio (around 0V) 
and positive CVs.
   Now negative CVs are something that you should definately plan for, 
simply because you never know what you're going to plug into!  If you are 
like me and like to patch audio signals into CV inputs, then you'll 
definately be dealing with negative CVs!  However it's an easy fix 
by using an active full-wave rectifiers on your CV inputs (you can also 
use half-wave if you don't want to deal with the inversion effect).  That 
way the input circuits just won't care what you plug in!
   But Harry has a point, if you are buying commercial, you don't really 
get a choice!

   Tony

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