Takashi Iwai wrote: > Torstein Hegge wrote: >> The C-Media CM6631 USB receiver doesn't respond to changes in sample rate >> while the interface is active. The same behavior is observed in other UAC2 >> hardware like the VIA VT1731. >> >> Reset the interface after setting the sampling frequency on sample rate >> changes, to ensure that the sample rate set by snd_usb_init_sample_rate() is >> used. Otherwise, the device will try to use the sample rate of the previous >> stream, causing distorted sound on sample rate changes. >> >> The reset is performed for all UAC2 devices, as it should not affect a >> standards compliant device, but it is only necessary for C-Media CM6631, >> VIA VT1731 and possibly others. >> >> Failure to read sample rate from the device is not handled as an error in >> set_sample_rate_v2(), as (permanent or intermittent) failure to read sample >> rate isn't essential for a successful sample rate set. >> >> Signed-off-by: Torstein Hegge <hegge@xxxxxxxxxxx> > > What about the latest status of the patch? > > If both Clemens and Daniel are happy with it, I can apply it for the > next 3.9-rc. Acked-by: Clemens Ladisch <clemens@xxxxxxxxxx> with or without this change: > Though, it would be nicer if two identical calls of snd_usb_ctl_msg > can be put into a single function, Regards, Clemens _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
