At Mon, 4 Jun 2007 15:23:06 -0700,
John L. Utz III wrote:
>
> Hello;
>
> I am working with an CMEDIA 8738-MC6 and i am trying to gain control of
> the second DAC by way of softvolume. but i seem to not be succeeding
> because my application cant find my 'Rear' control, am i doing this
> correctly?
>
> the original /usr/share/alsa/cards/CMI8738-MC6.conf
>
> CMI8738-MC6.pcm.rear.0 {
> @args [ CARD ]
> @args.CARD {
> type string
> }
> type hw
> card $CARD
> device 1
> }
>
> i have modified it to look thusly: notice that the type is now softvol
> and the original hardware description is encapsulated in slave.pcm
>
> # 2nd DAC
> CMI8738-MC6.pcm.rear.0 {
> @args [ CARD ]
> @args.CARD {
> type string
> }
> type softvol
> slave.pcm {
> type hw
> card $CARD
> device 1
> }
> control {
> name "Rear Playback Volume"
> card $CARD
> }
> }
>
> Shouldnt i now be able to see 'Rear Playback Volume' in the output of
> amixer controls ??
The control is created first when you access this defined PCM.
Try to open "rear" PCM first, then check amixer.
Once after a user-defined control is created, it can be saved/restored
via alsactl save/restore command.
Takashi
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