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Update feature_midi.md (#17390)

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Add caveat about usb endpoints.
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Tom Barnes 2022-06-14 11:12:52 +01:00 committed by GitHub
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@ -10,6 +10,10 @@ MIDI_ENABLE = yes
There are two MIDI systems in QMK: basic and advanced. With basic MIDI you will only be able to send Note On and Note Off messages using the note keycodes, meaning that keycodes like `MI_OCTU` and `MI_OCTD` will not work. Advanced MIDI allows you to do things like octave shifts, channel changes, velocity changes, modulation, and more. There are two MIDI systems in QMK: basic and advanced. With basic MIDI you will only be able to send Note On and Note Off messages using the note keycodes, meaning that keycodes like `MI_OCTU` and `MI_OCTD` will not work. Advanced MIDI allows you to do things like octave shifts, channel changes, velocity changes, modulation, and more.
### Caveats
MIDI requires 2 USB endpoints and as such may not work on some hardware such as V-USB controllers.
### Basic MIDI ### Basic MIDI
To enable basic MIDI, add the following to your `config.h`: To enable basic MIDI, add the following to your `config.h`: