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              Hi @BEB
First of all thank you for sharing this and for using Zynthian as a demo/test platform.
That’s just amazing 
But, yeah I too need a couple of explanations.
So zynthian acts as MIDI 2 hardware synth.
- How do you send MIDI 2 messages to zynthian ?
- By extension,  I’ve got a little DIY usb Midi gear based on a Arduino Pro Micro. What kind of mod is needed to make it MIDI 2 compliant ?
[Edit] Re reading carefully this thread helps a bit