Giuliano Pochini wrote: > > > On Mon, 9 Jul 2007, Andrei M. Zaparii wrote: > >> Hello! >> I'm struggling with playback sample rate from echo indigo IO card. If i >> try to just send wav file sampled at 44.1KHz to hardware destination >> like: >> aplay -D hw:1,0 badboys.wav >> Playing WAVE 'badboys.wav' : Signed 16 bit Little Endian, Rate 44100 Hz, >> Stereo >> it plays roughly two times slower then it should. > > The Indigo's cards support 32000, 44100, 48000, 88200 and 96000. > Please, can you have a look at the output of "aplay -v -Dplughw:1 > badboys.wav" and "aplay -v -Dhw:1 badboys.wav" ? I'm very curious to > know why it doesn't use 44100/S16_LE/stereo, since that format is > supported by the hardware. Yes, sure: ---8<--- time aplay -v -Dplughw:1 badboys.wav Playing WAVE 'badboys.wav' : Signed 16 bit Little Endian, Rate 44100 Hz, Stereo Plug PCM: Hardware PCM card 1 'Indigo IO' device 0 subdevice 0 Its setup is: stream : PLAYBACK access : RW_INTERLEAVED format : S16_LE subformat : STD channels : 2 rate : 44100 exact rate : 44100 (44100/1) msbits : 16 buffer_size : 27520 period_size : 5504 period_time : 124807 tick_time : 4000 tstamp_mode : NONE period_step : 1 sleep_min : 0 avail_min : 5504 xfer_align : 5504 start_threshold : 27520 stop_threshold : 27520 silence_threshold: 0 silence_size : 0 boundary : 1803550720 real 5m10.989s ---8<--- While nominal playtime for this song is 3m45s and ---8<--- time aplay -v -Dhw:1 badboys.wav Playing WAVE 'badboys.wav' : Signed 16 bit Little Endian, Rate 44100 Hz, Stereo Hardware PCM card 1 'Indigo IO' device 0 subdevice 0 Its setup is: stream : PLAYBACK access : RW_INTERLEAVED format : S16_LE subformat : STD channels : 2 rate : 44100 exact rate : 44100 (44100/1) msbits : 16 buffer_size : 27520 period_size : 5504 period_time : 124807 tick_time : 4000 tstamp_mode : NONE period_step : 1 sleep_min : 0 avail_min : 5504 xfer_align : 5504 start_threshold : 27520 stop_threshold : 27520 silence_threshold: 0 silence_size : 0 boundary : 1803550720 real 5m10.987s ---8<--- > NB: The card has ONLY ONE clock generator. If another application have > a pcm substream open and configured, the sample rate is locked at that > rate until the app closes it. I know it's a kludge, but there aren't > other fair ways to make sure that everything work fine. I had carefully read your description at http://www.webalice.it/g_pochini/ead/ so i understand about single sample rate at a time. I carefully checked that only aplay keeps pcm devices opened: ---8<--- lsof +D /dev/snd/ +c 0 COMMAND PID USER FD TYPE DEVICE SIZE NODE NAME xfce-mcs-manage 4919 zappa 5u CHR 116,7 8661 /dev/snd/controlC0 aplay 9201 zappa mem CHR 116,8 8620 /dev/snd/pcmC1D0p aplay 9201 zappa 4u CHR 116,8 8620 /dev/snd/pcmC1D0p ---8<--- I hope that i will have enough time on this weekend to update alsa and firmware to the newest versions and then i will be able to do more research. If You think that i can provide you with more info feel free to post requests. I'm eager to solve this mistery. -- Andrey ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ Alsa-user mailing list Alsa-user@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/alsa-user
