MOTM

>Next, you need something to trigger/control the 'voices'. Currently,
>only the Kenton Pro-2000 MIDI/CV converter can do this. It is limited
>to 2 'voices', and each MUST be on a separate MIDI channel.

I do not know if they are still being made, but the Pro-4 has a polyphonic
mode with various cycling options.  It can assign up to four voices to the
same MIDI channel.

>The upcoming Encore Expressionist 2 module can place 8 'voices' one the
>>*same* MIDI channel if you want.