On 9/29/07, Stas Sergeev <stsp@xxxxxxxx> wrote: > Hello. > > Trying to get a software amplification to > work with NForce CK804 AC'97, I've found > out that whatever the asound.conf I write, > the sound starts playing much faster than > it should. > After some debugging, I've found out the > following: > - The card (or the driver) only supports > 48000KHz. > - The program (any, because libao and artsd > suffer from that) is trying to set some > rate with snd_pcm_hw_params_set_rate_near(), > and that succeeds, but the returned rate > is 48000, while the requested is, say, 22050. > No wonder it then plays with the wrong speed. > Of course the program can check the returned > rate, but it sets the "direction" parameter > to 0, which should mean "take exactly that > value". > I've looked into an alsa-tutorial, and the > examples there do not check the returned > rate too - dir==0 should be enough. What ALSA tutorial are you looking at? All the ones I am familiar with state that you must check the returned rate. Direction is just a hint. http://www.alsa-project.org/alsa-doc/alsa-lib/group___p_c_m___h_w___params.html#ga3602c3c8912acf66c4db29f96608021 For example: http://www.alsa-project.org/alsa-doc/alsa-lib/_2test_2pcm_8c-example.html#a18 http://www.alsa-project.org/alsa-doc/alsa-lib/_2test_2latency_8c-example.html#a12 http://www.suse.de/~mana/alsa090_howto.html Lee _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
