On Tue, March 3, 2015 3:22 am, Ralf Mardorf wrote: >>On 03/03/2015 01:03 AM, Chris Caudle wrote: >>> for nearly every device the driver should be able to set the >>> sample rate > > But by what way can the sample rate be set? By using the snd_pcm_hw_params_set_rate_near () ALSA function. That is what jack2 uses. http://www.alsa-project.org/alsa-doc/alsa-lib/group___p_c_m___h_w___params.html#ga39124280d06ce63092a77e3f25ddd6ee > I've got PCI cards were jackd is able to set all available sample > rates, but for my PCIe card just some sample rates can directly be set > by jackd, for some sample rates I need to do it by alsamixer, before I > start jackd. That is very odd. Glancing at the alsamixer source I do not see any explicit sample rate controls, it appears to just get a list of supported controls from the card driver. I don't know why alsamixer would be able to find a sample rate control when hw_params_set_rate_near() did not work properly. You would probably need to discuss with the developer of the driver for that particular card. -- Chris Caudle _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/listinfo/linux-audio-user
