DMIX and alsa plugins (dmix plugin can be only connected to hw plugin)

["Frédéric DALLEAU" <frederic.dalleau@palmsource.com>]

Hi all,


I'm trying to use dmix with bluetooth-alsa in order to get sound mixing 
on bluetooth headset via a2dp.

I use dmix like this in my .asoundrc :

pcm.dsp0 {
    type dmix
    ipc_key 1456
    slave.pcm "hpheadphone"
}

pcm.hpheadphone {
        type a2dp
        bdaddr "00:0D:44:2A:17:C7"
}

I get the following error :

ALSA lib pcm_dmix.c:807:(snd_pcm_dmix_open) dmix plugin can be only 
connected to hw plugin

What can I do? However, my a2dp plugin seems to start correctly its 
initialisation!

Is there a way to fake a hw plugin? Can I force dmix to work with this 
plugin?

Any help is welcome, thanks,


Frédéric