Say you have two identical 6-voice synths, and you would like to merge them into one 12-voice synth.
The way I imagine this is:
You use a poly-spread type algorithm. Normally that would send each voice to a different midi channel, so you can use multiple mono synths, one for each voice.
In this case, I would like to use poly-spread to spread the notes over 12 midi channels, but then I want the signal to be filtered. One output should pass channels 1-6 and the other output should pass channels 7-12. Then after that, each output needs to have all its channels merged before going out.
So the output stream with channels 1-6 merges all notes to channel 1, and the other stream merges all its channels to channel 2.
Then one synth can listen on channel 1 and the other on channel 2.
Is this possible with the Midihub?