A tiny but exciting win today - I wrote the first line for the XM8 main controller, more specifically a midi proxy/distributor that copies all incoming midi to separate outs. This will let me support multiple voice cards without rewriting the interface (yet).
More importantly though, the proxy does a round robin voice assignment, so instead of forwarding note on/off messages directly, it sends the next note on to the least recently used voice (and makes sure to send note off first, at least for now. This paves the way for polyphony, which is something I've litteraly been waiting a decade for!
As for the communication, I use the serial TX and RX pins directly, from a Teensy 4.1 TX to a Teensy 4.0 RX. It worked immediately, no external components necessary.
It should also be possible to send MIDI at a higher bitrate, right now it runs at the standard 31250bps, I expect that at least 115200 should be problem free.
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| Don't cut the red wire! |
Next up is connecting two full voice cards. I can't wait, this is sooo cool!
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