What if you connect a single Midi cable from Midi Out to Midi In on the digitone. Would it then be possible to use the four midi tracks to modulate the four synth tracks via CC values?
When writing this I’m on the OS 1.11_BETA1 (needed for Overbridge 2.0 Public Beta) and there are some issues setting the channel to send mididata on from a Midi track so I can’t try this idea myself (I should send a bug report I guess).