[alsa-devel] UCM questions

[Raymond Yau]

2011/1/22 Liam Girdwood <lrg at slimlogic.co.uk>

> On Fri, 2011-01-21 at 14:53 -0600, pl bossart wrote:
> > >> I am fine with a system-specific configuration file for each use case,
> > >> but if I have to change the defines in alsa-lib it's a bit of a pain.
> > >> It'll imply branches and specific packages just for a stupid include
> > >> file.
> > >
> > > If the define isn't there you should just be able to use a string - no
> > > need to update the header file unless the thing being added is
> > > sufficiently general that it seems like a good idea.
> >
> > I think I am missing something here.
> > First I believe there's only one application (PulseAudio or resource
> > management of some sort) that will talk to UCM. Player applications
> > shouldn't know anything about UCM, right? You would end-up making
> > conflicting decisions.
>
> Yes, it's intended only Pulseaudio (or similar) will directly control
> the use case.
>

Do you mean that I cannot use my desktop to act as a karaoke by playing
music to default device and singing to the mic with "Mic Playback Volume" of
HDA codec  until pulseaudio or Sound preference implement "Mic Playback
Volume" ?