[alsa-devel] CMI8788/AV200/Oxygen Volume Controls in alsamixer (oxygen_mixer.c:dac_volume_get())
tiwai at suse.de
Fri Jan 23 14:56:31 CET 2009
At Fri, 23 Jan 2009 14:51:31 +0100,
Clemens Ladisch wrote:
> John L. Utz III wrote:
> > It appears to me that these functions are attempting to work on all of
> > the channels at once instead of just choosing Master, Front, Rear,
> > Surround, or what have you:
> Yes, the "Master" control is one control with eight channels.
> > this leads to a rather awkward result in alsamixer where there are 5
> > volume controls called "Master":
> > < Master > Master Master Master Master
> > IMHO, it would be more desirable for them to say:
> > < Master > Front C/LFE Surround Rear Surr
> Alsamixer chooses to display an eight-channel control this way. This
> can be considered a bug in alsamixer.
The current ALSA mixer abstraction splits the multi-channels into
separate paired channels. But alsamixer can't show the channel name
due to its UI design. And I guess other mixer apps don't handle them
properly, too (who would care?).
A solution would be make individual control like "Front", and create a
virtual master control.
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