On Wed, 27 Jul 2016 11:48:28 +0200, Antonio Ospite wrote: > > Hi, > > I used alsaucm to test mixer use cases for an Intel Baytrail tablet, I > wanted to use bare alsa before bringing pulseaudio in, and it took some > time to get my head around it. > > The output from the "alsaucm --help" is too terse, I had to look at the > alsa-lib code[1] to see the possible IDENTIFIERs, and even then it was > not clear to me that some operations, like for instance "list _devices", > can only work after setting a _verb in the same _execution_, for > instance this sequence doesn't work: > > # alsaucm -c bytcr-rt5640 set _verb HiFi > # alsaucm -c bytcr-rt5640 list _devices > > But this command does: > > # alsaucm -c bytcr-rt5640 -b - <<EOM > set _verb HiFi > list _devces > EOM > > Now that I know something more it makes sense: UCM just operates on > mixer settings, it does not have its own external state. > > However, my point is that a man page explaining these things can make > the life easier to new users. > > It would be better if alsa/UCM developers wrote the man page, but if no > one steps up I guess I could draft a first version myself. Go ahead, please post your draft version. That's already helpful. thanks, Takashi _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
