Reggie

@MrBlueXav stm32F4 code for usb midi device :) https://github.com/norbim1/preenFM2/blob/master/src/usb/usbd_midi_core.c

I can't test this as I don't have a nanokontrol, I'm using an arturia minilab.

it's because you've hardcoded the Itf_Desc and Ep_Desc index values. Take a look at mine or tomassch's fork to see the difference in how we handle the connected midi device:...