Hi Felipe, > Indeed, that's also mandated by USB spec. Seems like we need to patch > f_uac2.c. Can you check if setting the IN endpoint as implicit feedback > data is enough?
Just tried your proposed patches on 4.15.1 (with an RPi Zero) and with g_audio, unfortunately there is no change. Device is still not recognized, and having the same error code. So, a real feedback IN endpoint is needed ☹ Regards /Robert