On Fri, 19 Feb 2010, Raymond Yau wrote: > 2010/2/19 Jaroslav Kysela <perex@xxxxxxxx> > >> On Thu, 18 Feb 2010, Lennart Poettering wrote: >> >>>> For the Mic Boost +20dB case , how PA handle this +20dB switch in the >> "Flat >>>> Volume" model if you did not expost the Mic Boost switch to the user in >> the >>>> mixer control ? >>>> >>>> +20dB is quite significant in with the Capture Volume control >>> >>> We currently don't cover boost switches, simply because tehre is no dB >>> data queriable for them. >>> >>> I'd really prefer if those boost switches would be turned into binary >>> volume elements which carry normal dB information like any other >>> volume element. After all they are just a volume element, with only >>> two steps. >> >> I like this idea. >> >> Jaroslav >> >> > PA assume every sound card can only record from one capture source at the > same time (like those AC97 card ) > > However HDA support multi streaming capture , the capture device 0 may have > more than one subdevice "Capture sources" depend on the codec and device > 2 has 2 subdevice for capturing "Input sources" on some codec > > Is HDA_SUBDEV_NID_FLAG or any API for the application to find the correct > mixer control for these kind of capturing subdevices ? ( simple mixer api > is not able to know the subdevice number ) This API is not implemented at the time. Jaroslav ----- Jaroslav Kysela <perex@xxxxxxxx> Linux Kernel Sound Maintainer ALSA Project, Red Hat, Inc. _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
