On Wed, 4 Jan 2023 at 02:13, Takashi Iwai <tiwai@xxxxxxx> wrote: > > That's weird. Is snd_usb_audio driver bound with the device at all? > That is, does it appear in /proc/asound/cards? > Yes, it's there. 0 [V49 ]: USB-Audio - V49 Alesis V49 at usb-0000:08:00.1-3, full speed 1 [NVidia ]: HDA-Intel - HDA NVidia HDA NVidia at 0xfc080000 irq 154 2 [U192k ]: USB-Audio - UMC404HD 192k BEHRINGER UMC404HD 192k at usb-0000:08:00.1-4, high speed 3 [Generic ]: HDA-Intel - HD-Audio Generic HD-Audio Generic at 0xfca00000 irq 156 -- Michael