Archive of the former Yahoo!Groups mailing list: MOTM

I'm doing this using a Roland MPU-101 midi-to-cv box, 8 vco's - 2 for
each voice into 4 seperate VCA's, all sharing one envelope generator.
Next we mix all four voices in a mixer, and THEN into my MOTM 440 with
it's own envelope generator, lastly out to a seperate VCA with it's
own envelope generator. It's very effective and very FAT sounding!

The MPU-101 gives the CV out to each VCO pair, it also provides the
gating for each voice's VCA. My system is .com/MOTM hybrid, so I use
the .com MIDI converter in the keyboard to drive the Roland MPU-101
and the keyboard's CV buss as well. The keyboard CV/gate buss
controls the MOTM 440's envelope generator and the final out VCA's
envelope generator.

Using this is quite a handful! I used to be able to do this sort of 4
voicing with my Polyfusion much more eassily since the VCO's on the
Polyfusion were silent-running, in that after a CV in ceased, the VCO
went quiet, and hence there was no need for the seperate VCA after
VCOs on each voice. The .com VCO's do not have this feature, in the
absence of a CV they go to the 1/12v (or is it 0v?) setting rather
than go silent. I have discovered that a negative 1/12v input will
silence the VCO's and it might be possible to build something like
the old "Byter-Box" to condition the CV inputs with 4 Schmidt-Trigger
circuits, to "quiet the VCO's of each voice.

Better yet might be to have a quad-CV/gate buss on the keyboard
itself. The .com keyboard has dual CV/gate capability, and this can be
used to smooth the action, splitting the patch into two-two voice
sections..if it had quad-CV/gate (and perhaps a small peak trigger
signal for each of the four) the process would be even better.

Cheers!