Re: [SLUG] Adjusting volume on bluetooth headset

[Luke Yelavich <themuso@xxxxxxxxxxx>]

On Wed, Feb 17, 2010 at 04:52:12PM EST, Peter Chubb wrote:
> Hi folks,
>    I've recently acquired a bluetooth headset capable of a2dp
>    streaming.  After a lot of mucking around I've managed to get it
>    sort-of working with mplayer.  But I can't wwork out how to adjust
>    the volume.
> 
>    I do
>      mplayer -ao alsa:device=bluetooth file.ogg
>    and I get sound from the headset.  But alsamixer doesn't see the
>    mixer, and it's too loud.  Mplayer's volume control says it has
>    changed the volume, but it doesn't seem to make a difference ---
>    even when mplayer reports 0% there's still lots of volume.

Probably the ALSA interface to bluetooth is not working very well. What alsa-lib and bluez versions are you using?
 
>    And 
>        cat /proc/asound/devices
>   shows only the on-board Intel sound card, not bluetooth.

Thats because ALSA bluetooth support is via an alsa plugin provided by the bluez package, as all audio goes via the bluez stack.

Luke