>Brandon
>
>Does your Synclav keyboard give off a high frequency whine behind the
>display when powered up?  I am not sure if my power supply is supposed to
>give off this sound?

They can hum if they are not secured tightly.  I have been told that dust
can get into the "windings" of the transformer and cause audible noise.  My
Synclavier II's power supply "sings" when I play back FM sequences.  The
output voltage is fine, however.  You may need to swap power supplies.

Since the SCSI connector for the keyboard cable (to
>tower) is right on top of the supply, do you think this high freq. signal
>could be getting coupled into the keyboard cable?  When I increment the
data
>wheel on my keyboard, I can hear the values change in the audio outputs.

That used to happen on my Synclavier II also (when it was a stand-alone).
When it was rebuilt as a slave the noise went away.  However, I can hear
that kind of noise in my CLICK OUTPUT in my 3200 (w/Keyboard Interface).
Although, this is a VERY low qualtiy output, I don't really care (the
schematic proves it).  You are somehow getting "computer noise" in your
audio.  Bad connections, grounds, etc. would be the first culprit.  You
might have a component "going" that is allowing the noise to "leak" into
your audio.  The DDV voice cards should be VERY clean.  With all the
problems you have, you might need a complete re-cabling.

Brandon Amison
Yaking Cat Music Studios
Synclavier Assistance
Music for Television and Film
http://www.yakingcat.com/yaking/
THE source of Synclavier information