[alsa-devel] Specs available for Sweex External 5.1 with digital in/out USB 2.0 / C-Media CM6207

Clemens Ladisch cladisch at fastmail.net
Thu Jun 5 12:27:46 CEST 2008

Erik Slagter wrote:
> These are the actual issues (so far, I didn't yet test it exhaustively):
>   - using 2 channel output the sound is garbled; it looks like the
> "wrong" 2 channel alt setting is used (output of
> /proc/asound/card?/stream0 on request), 4/6 channel output is OK though.
>   - some high squeeking noise although C-Media claims the IC to be
> high-end (or maybe their definition of high-end differs from mine ;-))
>   - all outputs are labelled "speaker 1"
>   - only two outputs have a mute knob, the others cannot be silenced in
> any way, only turned down
>   - one of the two outputs with the mute knob doesn't appear to do
> anything (or maybe it's the sp/dif output?)
>   - the other (with mute) controls the front output
>   - the others (without mute) don't seem to do anything at all

Please show the output of "lsusb -v" for this device.


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