I've looked into several bare metal USB drivers (Circle, USPI, CSUD) and I can find no support for audio beyond MIDI.
Has someone worked on things like reading data from a USB microphone and possibly pushing sound to USB
If such a driver does not exist, could this document allow me to write one ?
https://www.silabs.com/documents/public ... /AN295.pdf
https://www.silabs.com/documents/public ... lified.pdf
Addendum - I found something in Ultibo.
Does anyone know the status of Ultibo? The last news they have is from May 2018...