[alsa-devel] [PATCH 0/6] snd-usb endpoint rework, version 7

Grant Diffey gdiffey at gmail.com
Fri Apr 13 03:39:04 CEST 2012

On Fri, Apr 13, 2012 at 9:59 AM, Grant Diffey <gdiffey at gmail.com> wrote:

> On Thu, Apr 12, 2012 at 9:51 PM, Daniel Mack <zonque at gmail.com> wrote:
>> Here's the 7th iteration of patches that reimplement the streaming logic
>> of
>> the ALSA USB audio driver.
>> There were some bugs reportes by Felix and Grant, which have been
>> resolved.
>> More testing is definitely important, but maybe the code will get a wider
>> test coverage when merged to the development tree?
> So I've also tested this against the current -rt head and can report that
> it solves the clicking problem with playback there as well.
> Grant.

so dumb question...

is setting a sane set of alsa controls a problem for the driver or

the problem is.

if all volumes are max on module insert. the ftu is essentially unusable
untill they're corrected

and there's no event for device removal (you don't eject a soundcard)

A script like this:


for i in $(seq 8); do
        for j in $(seq 8); do
                if [ "$i" != "$j" ]; then
                        amixer -c Ultra set "DIn$i - Out$j" 0% > /dev/null
                        amixer -c Ultra set "DIn$i - Out$j" 100% > /dev/null
                amixer -c Ultra set "AIn$i - Out$j" 0% > /dev/null

*Sets the internal mixer to a 1:1 mapping to outputs (so each input
corresponds to each output)


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