Octave Cat gate/CV inputs

[Jim Mellor]

dear List
I have an old Octave Cat (I think its revision B but that's still
earlier SRM model) and it has quite an abnormal CV and gate arrangement.
Using a Phillip Rees cheapo MIDI-CV converter, I patched into the
internal keyboard connector for CV and onto the envelope circuit
somewhere to get a gate input. Responding to MIDI, it would not trigger
on the same note value more than once (i.e. no Night Rider-esque
baselines). Even more annoying was if there was a slight change in the
CV (even a very slow pitch bend) the note would re-trigger. Another
problem was that the gate would trigger itself randomly without me
pressing anything. Failure!
I guess this is because of its mad duophonic keyboard scanning; there
are no trigger outputs from the keyboard because its two sets of
contacts are both generating CVs, one set for highest note priority and
the other for lowest note priority and then routed to individual
oscillators. Somewhere along the line the note CV change is detected and
turned into a trigger for the two EGs. I think this may be how the
Odyssey used to work because I read that Octave ripped off ARP when they
were designing the Cat, but I could be wrong.
If anyone could tell me about the insides of the Cat or if anyone has
come across this kind of thing before I would be very interested in
hearing any ideas on how I might get a reliable gate input and a non
triggering CV input. Any help would be much appreciated.
Okay thanks
Jim