Hi Sidney

> Hello. I am very interested about the possibilities of the A-190-5 Polyphonic Midi-to-CV/Gate Interface. Does anybody knows if four oscillators controlled by one Midi channel, could be connected to a A-138 B mixer module and this output connected to a single filter and ADSR envelope to make a complete polyphonic system Or would I need a filter and adsr and vca per voice

beside the fact, that it is not very clear how the real A190-5 will look
like.

You can use both combinations. The one you are describing is in fact how
the Korg Monopoly works.

Florian