Javier Kohen wrote: > I've written the attached patch to disable the master volume control > in this chipset. The datasheet [1] documents two independent channel > volume controls, one master mute control and one master volume > control. However, at least on my device (a Fubar USB DAC), the master > volume control always returns USB stalls when queried for any of its > parameters (min/max/res/cur). I'd guess that Windows ignores the master volume when it finds channel volume controls, so this function was never actually tested. > However, it seems that either the USB specs are wrong, They are abominations written by committees. > or my USB hub or the card are buggy. Your hub is certainly buggy ... > the PCM2702 and my motherboard don't interact well. After a while the > sound is degraded, first into a hiss, then into pure noise. ... the card too. Your patch looks good; please provide a log message and a Signed-off-by tag. Best regards, Clemens _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
