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Yes, I have that set of Yamaha engineering notes. In fact, that page
you indicated was my primary guideline for the discrete version. I think
the reset pulse is to guarantee a full waveform reset (full capacitor
recharge) at the higher frequencies such that the pitch doesn't start to
go flat.

That page also shows why tracking of the VCOs is such a pain; the
transposition setting resistor (Rft) has to be exact for each desired
octave, which is why there are trimmers for each one. If the Rft value
for a given octave is off even slightly, the tracking goes south.

I have my prototype CS VCO running into my production CS filter. It
sounds very nice. :) I'll record some audio clips this weekend.

In other news, I built and tested the NE11000 VC-BPF as used in the
GX-1, and it works great..except that I wired the resonance pot backward.
(The original NE11000 did not have a variable resonance control; it only
had a trimmer that was set and sealed for a Q of 4 or so).

Crow
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