Adrian Stancu wrote: > I'm using an E-MU 0404 USB interface with the snd-usb-audio module > from alsa 1.0.16, operating in isochronous asynchronous mode. This > interface was producing very annoying click/pop sounds at regular > intervals during playback. Eventually I discovered that the > syncronisation mechanism telling the driver to send audio data faster > or slower to match the interface's consumption speed does not work as > expected, for some reason. The momentary frequency as requested by the device is shown in /proc/asound/card?/stream? (if CONFIG_SND_VERBOSE_PROCFS is enabled). Try something like: while sleep 0.3; do grep "Momentary freq" /proc/asound/card0/stream0; done In theory, once the device has determined its own speed relative to the computer, this value should be nearly constant. (When a stream has just been started, the requested frequency usually is higher because the device's buffer is empty.) Regards, Clemens _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
