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  • Actually just took a quick look at this, and it seems that USB MIDI isn't a HID device after all (at least looking at this code), which means a report descriptor may not be enough.

    If that's the case I'm afraid you might be out of luck - it'd require changes to Espruino to let you specify the whole config descriptor. I hadn't done that because it's actually very device specific (setting endpoints and suchlike) and it also contains stuff to do with the USB com port as well.


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