Update feature_midi.md (#17390)

Add caveat about usb endpoints.
3 years ago · 026d0e8bf1
parent e49fa43a7f
commit 026d0e8bf1
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--- a/docs/feature_midi.md
+++ b/docs/feature_midi.md
@ -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.

+### Caveats
+
+MIDI requires 2 USB endpoints and as such may not work on some hardware such as V-USB controllers.
+
 ### Basic MIDI

 To enable basic MIDI, add the following to your `config.h`: