Getting polyphony working on MIDISID

I have three modes in mind for MIDISID. One is the General MIDI mode I've been demonstrating, another is 'polyphonic', which uses the voices of the SIDs (in this case 2 sids for 6-note polyphony) to allow you to use the SID voices with any MIDI controller (such as a keyboard).

Here I have my piano injecting MIDI into the MIDISID. It's very responsive, despite the fact that bluetooth and a USB-MIDI adaptor are involved.

I am only messing around here to demonstrate the responsiveness (which is superb) and the 6-note polyphony. There are no amazing SID sound effects (yet). So far just some plain patches to simulate various keyboards.  I am able to change 'patch' using the controls on my piano, although those don't match up with the GM program numbers that I'm implementing in the MIDISID.



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