copy all output to my Soundcard to bluealsa too

[novazur972]

Hi,

I've already spent a lot of time looking for how to do it, but I can't figure it out on my own. I really need your skills.
I use the alsaequal and dmix plugin for output to my sound card with the configuration below:

defaults.pcm.card 0 # or better "PCH"
defaults.pcm.device 0
ctl.equal {
         type equal;
}
pcm.plugequal {
         type equal;
         slave.pcm "plug:dmix";
}
pcm.asymed {
         asymmetric type
         playback.pcm "plugequal"
         capture.pcm "hw:3.0"
}
pcm.!default { type plug slave.pcm "asymed" }

I use bluealsa to get the sound output (with or without equal) to my bluetooth headset, and it works fine with the following setup:

ctl.equal {
type equal;
}
pcm.plugequal {
type equal;
slave.pcm bt;
}
pcm.equal{
plug type;
slave.pcm plugequal;
}

pcm.bt {
         plug-type
         slave.pcm bluealsa
}
ctl.bt {
         blue alsa type
}

pcm.asymed {
         asymmetric type
         playback.pcm "plugequal"
         capture.pcm "hw:3.0"
}

pcm.!default { type plug slave.pcm "asymed" }

But what I would have liked to do is that all the sound goes out on my sound card AND on the bluetooth headset if it is connected, so a copy to the bluetooth.
I tried to follow many documentations but without success.
I have the feeling that it is necessary to use multi, but will not I lose the use of the dmix?
Your help would be invaluable, especially with a specific configuration example that does what I need.
(If there are superfluous elements in my configurations, feel free to delete them)
Thanks in advance
(google translate)

[borine]

I think that what you are trying to achieve is not possible with ALSA plugins. As noted in the wiki page, the BlueALSA PCM plugin can be opened by only one application at a time, so if you place a multi plugin in front of it then that multi can also be opened by only one application at a time.

[novazur972]

Ok, I understand. Thank you.
Do you know if pulseaudio is the solution ?
I don't know anything about it.
I have always postponed the moment when I should go there. I hate overlays. Pulseaudio is an ALSA overlay, isn't it?
But if it's the solution to having a more agile system than it is with ALSA alone, maybe I'll have to switch to pulseaudio.