Pulse Audio Sound Levels

[Colin Law]

On 12 March 2013 00:44, Lanoxx <lanoxx at gmx.net> wrote:
> Hi,
>
> I have a sound system from Teufel (Concept C 200) which has a built in USB
> sound card and an analogue aux input. When I connect the USB cable to my
> computer and the aux cable to my radio, then the sound of the radio does not
> play. When I unplug the USB cable the sound from the radio starts playing
> immediately. I have found out from the hardware manual that the sound card
> is able to control the aux output and mute it or control the volume. On
> windows it is possible to simultaneously enable both usb and aux inputs (see
> [1]). I have not found any way to do the same in Ubuntu so far and I would
> like to know if this is a bug (or missing feature) in which case I would
> report it on launchpad, or if I simply haven't found the right option.
>
> I have already tried to use alsamixer and pavucontrol. In alsamixer i can
> see that the usb sound card has separate "speaker" and "line" devices, but
> changing the volume does not affect the output. In pavucontrol there is
> simply no way to see the difference between "speaker" and "line" as there is
> only a single volume control for the usb sound card.

This would probably be better sent to the ubuntu users list
https://lists.ubuntu.com/mailman/listinfo/ubuntu-users

Colin