USB Wireless device support

[Takashi Iwai]

On Wed, 13 Jan 2021 16:41:04 +0100,
Bastien Nocera wrote:
> 
> On Wed, 2021-01-13 at 16:17 +0100, Takashi Iwai wrote:
> > 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?
> 
> My idea was to create my own sound card (it's a separate USB interface
> after all) exporting the sidetone mixer, and figure out how to merge it
> with the USB audio interface at PulseAudio's level.

It would work, then.  OTOH, if integrating in PA, it's not necessarily
to be ALSA mixer interface but a simple input device, too...


Takashi