On Tue, 7 Oct 2003, James Courtier-Dutton wrote:
> Takashi Iwai wrote:
> > At Tue, 07 Oct 2003 18:00:22 +0100,
> > James Courtier-Dutton wrote:
> >
> >>I have 2 sound cards, card 0 is the motherboard intel/alc650 one, and
> >>card 1 is a SB Audigy2
> >>
> >>Playing two streams at once on device "front:1" works: -
> >>aplay -D front:1 filename.wav
> >>aplay -D front:1 filename.wav
> >>So, this is playing two files to the SB Audigy2 front speakers.
> >>I can hear the two files being mixed together and output together to a
> >>single set of speakers.
> >>
> >>Playing two streams at once on device "rear:1" fails: -
> >>aplay -D rear:1 filename.wav
> >>aplay -D rear:1 filename.wav
> >>So, this is trying to play two files to the SB Audigy2 rear speakers.
> >>
> >>The first files comes out of the rear speakers, but the output from the
> >>second aplay command fails with: -
> >>
> >>bash-2.05b# aplay -D rear:1 filename.wav
> >>Playing WAVE 'filename.wav' : Signed 16 bit Little Endian, Rate 44100
> >>Hz, Stereo
> >>ALSA lib setup.c:94:(snd_sctl_install) Cannot lock ctl elem
> >>aplay: set_params:876: Unable to install hw params:
> >>ACCESS: RW_INTERLEAVED
> >>FORMAT: S16_LE
> >>SUBFORMAT: STD
> >>SAMPLE_BITS: 16
> >>FRAME_BITS: 32
> >>CHANNELS: 2
> >>RATE: 44100
> >>PERIOD_TIME: (125011 125012)
> >>PERIOD_SIZE: 5513
> >>PERIOD_BYTES: 22052
> >>PERIODS: 2
> >>BUFFER_TIME: (250022 250023)
> >>BUFFER_SIZE: 11026
> >>BUFFER_BYTES: 44104
> >>TICK_TIME: 1000
> >>
> >>Can you explain why this might be happening?
> >
> >
> > this is because the "Wave Surround Playback Volume" control is locked
> > by the first rear stream.
> > you can find it in /usr/share/alsa/cards/Audigy2.conf.
> > please try to remove the lock.
> >
> >
> > Takashi
> >
> Thanks that fixed the problem.
> Please see attached patch files, for the SB Live and Audigy2, both of
> which have been tested.
Yes, but the question is, if we want this behaviour. We expect that the
rear channel will go only via rear speakers thus setting of Wave Surround
Volume is required.
Jaroslav
-----
Jaroslav Kysela <[EMAIL PROTECTED]>
Linux Kernel Sound Maintainer
ALSA Project, SuSE Labs
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