On Wed, 13 Jan 2021 16:13:40 +0100, Bastien Nocera wrote: > > On Wed, 2021-01-13 at 16:08 +0100, Takashi Iwai wrote: > > <snip> > > Nothing so far, and that's the problem. HID is managed in a > > completely different layer, hence the integration needs to be done in > > a higher level like PA, I suppose. In theory we might be able to > > extend UCM to handle the other external devices, though. > > hid-prodikeys.c seems to do some MIDI stuff... It creates its own sound card. But you want to use the mixer switch for the existing audio interface, right? Takashi