can somebody show me an example asound configuration for dmixing with hifi bluetooth speakers/headset

[Jelle de Jong <jelledejong@xxxxxxxxxxxxx>]

Hello everybody,

I have been periodically trying to get multiple audio sources to play
together (dmixing) to a hifi bluetooth speaker system or hifi bluetooth
headset.

I am using only alsa and no pulseaudio, esd, jack, mas of something else
just alsa with asoundrc configuration files and no graphical environment.

Can somebody show me an example asoundrc config file to make it possible
to use software audio mixing with my bluetooth devices. If this is
currently not possible, please tell why and what we can do about it. I
am willing to donate some payal money to the person providing me with a
working asoundrc configuration file that allows me to play multiple
audio sources at the same time.

Thanks in advance,

Jelle

pcm.headset {
    type bluetooth
    #~ device 00:0D:18:A0:35:70
    #~ device 00:53:53:FB:7E:9C # Nokia BH-801
    device 00:0C:55:D1:C9:78 # Motorola S805
    #~ device 00:0D:FD:18:6E:3C # Motorola S9
    #~ device 20:07:09:15:A9:5A # Samsung WEP210
    profile hifi
    #~ profile voice
    #~ profile auto
    mode stereo
    #~ mode joint
}
pcm.softvol {
    type softvol
    slave.pcm headset
    control.name Headset
    control.card 0
}
pcm.!default {
    #~ type hw
    #~ card 0
    type plug
    slave.pcm softvol
}