Minimoog VCA cloning report

Haible Juergen Juergen.Haible at nbgm.siemens.de
Mon Feb 21 13:26:26 CET 2000


Hi Jörgen,

	>The senitivity of the CV inputs is way too high, by the way. It is
around 1 volt for full effect. Beyond that, >you just don't get more gain.

I don't have schemos here in the office, but from memory I thought it was
something "ordinary"
like 5V. I didn't encounter the hard clipping you described, either.

	>P.S. can anybody explain what the diodes at the output are good
for? The conduct if the signal goes >above the positive supply or below
ground. At this point the signal is biased to 6V. But how could it ever >go
above the positive supply?

That's for protection. Musicians are an experimental kind of breed, and
someone might patch two
outputs together by accident. (or out of curiosity. Just think of Pink
Floyd's famous use of Wahwa
pedals (backward ...) )
And the other device might be powerd from higher voltage.

JH.



More information about the Synth-diy mailing list