At Mon, 21 Apr 2008 10:45:51 +0300, Ihar Hrachyshka wrote: > > On Thu, Apr 17, 2008 at 2:57 PM, Takashi Iwai <tiwai@xxxxxxx> wrote: > > At Thu, 17 Apr 2008 10:27:59 +0000, > > > > Ihar Hrachyshka wrote: > > > > > > Hello! > > > I build my BF533-EZKIT-based board (Blackfin processor development > > > board) sound system on AD1386A sound. I use blackfin.uclinux.org > > > distribution for it. One of my board's function is to play three > > > different stereo sound streams simultaneously on it. What I done is > > > choosing for AD1386 '3 stereos' option. After loading the kernel, my > > > software is able to open pcm 3 times and plays sound properly, with no > > > glitches or smth. The only missed functionality is that I can't > > > specify the needed subdevice I want to play a stream on. I should have > > > the possibility to play, f.e., mplayer stream on the 3rd stereo output > > > while the 1st and the 2nd are not used. How can I do it? > > > > You can pass three numbers to PCM arguments: card, device and > > subdevice. For example, the below will choose card = 0, device = 2, > > subdevice = 1, i.e. the secondary substream: > > % aplay -Dplughw:0,2,1 > That's what I've done: > > # arecord -c 2 -f dat -d 30 a.wav > # aplay -Dplughw:0,0,0 a.wav > ALSA sound/blackfin/ad1836.c:924: snd_ad1836_playback_open > Playing WAVE 'aAwLvS A isnodu1n di/ biltaecEkdfai,nR/ta d8108 3z6 .tcr:o1 > > 046: snd_ad1836_hw_free > ALSA lib ../../../alsa-lib-1.0.12-svn-rev6478/src/pcm/pcm_plug.c:773:(snd_pcm_plug_hw_refine_schange) > find an usable access for 'plughw:0,0,0' > aplay: set_params:904: Sample format non available The problem seems different. I guess you can't run with 'plughw:0' as well? According to the message, the sample format isn't available although wrapped with plug layer. Did you install all alsa-lib plugins properly? If you don't pass any configure options, all plugins should be built. Takashi > > # arecord -c 2 -f S32_LE -d 30 a.wav > # aplay -Dplughw:0,0,0 a.wav > ALSA sound/blackfin/ad1836.c:924: snd_ad1836_playback_open > Playing WAVEA'L.SaA' :sSoguen d2/bbtlLatclk fniinn/ aade18803 6z. ct:r1o0 > > 46: snd_ad1836_hw_free > ALSA lib ../../../alsa-lib-1.0.12-svn-rev6478/src/pcm/pcm_plug.c:773:(snd_pcm_plug_hw_refine_schange) > to find an usable access for 'plughw:0,0,0' > aplay: ../../aplay/aplay.c: 919: set_params: Assertion `err >= 0' failed. > Aborted by signal Aborted... > > Though ALSA shows that I have 3 subdevices it doesn't work with > plughw:0,0,0..2. What else can I do to iinvestigate the problem? > > > > > > > Also that would be great if I can optionally play the same stream on > > > all the outputs. > > > > You'll need to define a PCM with multi plugin. > > > > > > Takashi > > > _______________________________________________ > Alsa-devel mailing list > Alsa-devel@xxxxxxxxxxxxxxxx > http://mailman.alsa-project.org/mailman/listinfo/alsa-devel > _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
