[alsa-devel] about UCM on bluetooth headset

Lu Guanqun guanqun.lu at intel.com
Mon Aug 22 15:29:08 CEST 2011

On Mon, Aug 22, 2011 at 06:46:02PM +0800, Liam Girdwood wrote:
> On 22/08/11 07:19, Lu Guanqun wrote:
> > Hi Liam,
> > 
> > In alsa-libs:include/use-case.h, there are below lines:
> > 
> > 	* a conversation etc. The device describes the physical audio capture and playback
> > 	* hardware i.e. headphones, phone handset, bluetooth headset, etc.
> > 
> > I'm not quite clear about how to set a use case for bluetooth headset.
> > According to my understanding, bluetooth doesn't fall into the category
> > of ALSA, therefore there's no such direct devices for it.
> > 
> > Could you shed some lights on this? What's the best practises to use UCM
> > with bluetooth?
> > 
> This is intended for systems where the BT audio is integrated in some
> way with the other audio ICs. It's intended to configure the other
> audio devices to allow use cases involving BT in such systems.

Hi Liam,

Thanks, I got your point. For example, where BT HSP is implemented over
ALSA PCM, it's most probably exposed as an ALSA device, then we can
configure it.


More information about the Alsa-devel mailing list