Some update concerning changing rates... As Torstein predicted - > One thing I have seen is that when ALSA initializes a new device, it > sets the sample rate to the highest rate supported by the device. If a > pulseaudio daemon runs, even if it isn't going to output sound on the > usb sound card, it will set the card sample rate to 44.1kHz right after > the snd-usb-audio module is loaded. This will cause the first track > played at 44.1kHz not to be a sample rate change. This might account for > the difference if all three distros run pulseaudio and openwrt doesn't. > > Can you try to see what happens when you switch between content with > different sample rates on one of the linux distros? There are some > samples available at http://01688cb.netsolhost.com/samplerdownload/ > If the pulseaudio theory is correct, you will see the sample rate change > problem there. I tried the Openwrt-box with 3.6.11 kernel which already uses the patch and I did not have any problems changing sample rates. I had two tracks, one 44.1kHz and one 96kHz. No matter which was started first, there were no problems noticed. On the laptop I used the Slax distro with 3.8.2 kernel, which I believe does not use the patch, because it is not present in 3.8.3 kernel. If I started to play the file with 96kHz track, the sampling rate frequency (checked in cat /proc/asound/card2) was set wrong, but if the track was stopped and restarted the sampling frequency was correct. When I switched to 44.1kHz the sampling frequency was wrong and again after stopping and restarting the track it was correct. I did the reboot of the laptop and this time I started with 44.1kHz and the sampling rate frequency was correct. When I changed to 96kHz track the sampling frequency was wrong but after stop and restart it was correct. And if I changed to 44.1kHz from the sampling rate was again wrong, but was correct after I stopped and restarted the track. Davor. ------------------------------------------------------------------------------ Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_d2d_mar _______________________________________________ Alsa-user mailing list Alsa-user@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/alsa-user
