At Thu, 27 Nov 2003 18:16:05 +0200 (EET), Kai Vehmanen wrote: > > On Wed, 26 Nov 2003, Takashi Iwai wrote: > > >> On the same machine, alsa-driver-0.9.8 works fine, but not with 1.0.0pre1 > >> and 1.0.0pre3. > > what do you mean exactly "don't work" in the above? > > the operation is blocked, or returns an error? > > if it's blocked, check /proc/asound/card0/pcm0*/sub0/* files. > > I think I found the problem. In 1.0.0preX, the supported sampling rate > is limited to 48000Hz and this causes all kinds of problems if running > with lower rates (I've mostly tested running at 8000Hz) - i.e. when > using alsa-lib for sr-conversion. > > With 1.0.0pre3, for example "arecord -r 8000 - |aplay -r 8000 -" produces > constant xruns. A similar app that relies on poll()/select(), fails even > more severely. When looking at... > > /proc/asound/card0/pcm0p/sub0/hw_params and > /proc/asound/card0/pcm0c/sub0/hw_params > > .. the rate is locked to 48000 with 1.0.0pre3. On the same machine with > 0.9.8, the hw-rate is 8000. I've used the 'default' PCM device in all my > tests. > > > does this laptop have multiple codecs? you can find them in > > /proc/asound/card0/codec97#* directories. > > Nopes, '/proc/asound/card0/codec97#0/ac97#0-0' is the only one,
ok, then the problem is not the multiple codec but the detection of available sample rates... Takashi > and contains: > --cut-- > 0-0/0: Cirrus Logic CS4299 rev 6 > > Capabilities : -headphone out- > DAC resolution : 20-bit > ADC resolution : 18-bit > 3D enhancement : Crystal Semi 3D Stereo Enhancement > > Current setup > Mic gain : +0dB [+0dB] > POP path : pre 3D > Sim. stereo : off > 3D enhancement : off > Loudness : off > Mono output : MIX > Mic select : Mic1 > ADC/DAC loopback : off > Extended ID : codec=0 rev=0 AMAP DSA=0 VRA > Extended status : VRA > PCM front DAC : 48000Hz > PCM ADC : 48000Hz > SPDIF Control : Consumer PCM Category=0x2 Generation=1 Rate=48kHz > --cut-- > > -- > http://www.eca.cx > Audio software for Linux! > ------------------------------------------------------- This SF.net email is sponsored by: SF.net Giveback Program. Does SourceForge.net help you be more productive? Does it help you create better code? SHARE THE LOVE, and help us help YOU! Click Here: http://sourceforge.net/donate/ _______________________________________________ Alsa-devel mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/alsa-devel
