Dear MIDI association and forum members,

Recently, I took a little dive into the world of MIDI by programming a Raspberry Pi Pico (rp2040) to send messages like NoteOn, NoteOff, ControlChange, … to a PC via USB. My DAW (LMMS) is able to receive these messages and play notes or move sliders.

In order to let the DAW change the slider value of a motorised slider, the DAW needs to send messages to the device. Does it do that automaticly or does the device need to send a request? What messages are they? Are they ControlChange-messages or a completely ther format?

Thanks for further advice.

Yours faithfully

J.