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Vintage Synth Repair

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Prophet 600 auto-tune problem?

Prophet 600 auto-tune problem?

2002-08-05 by Brian Andrew Marek

I am looking at a Prophet 600 and have come across an interesting
situation - the auto-tune feature actually throws voice 4 of bank B OUT
of tune - almost exactly one half-step flat.  I can get the voice in
tune with the trimpot that's next to the oscillator chip, but the moment
you hit auto-tune (or, if you turn it on, because it does auto-tune
automatically), wham, it's out of whack.  All other voices on both banks
are perfectly fine.  Any ideas?  I fixed some more major issues with the
synth, but I'm told it was doing this before it went down the first
time...

BaM

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