Alsamixer won't work with bluetooth device
Figured out a workaround. Using alsa's softvol
plugin to do volume control in software.
Added this to .asoundrc
:
pcm.btheadset_softvol
{
type softvol
slave.pcm "btheadset"
control.name "Bluetooth"
control.card 0
}
Now I tell software to play to the device btheadset_softvol
and my main sound card's mixer has a "Bluetooth" option.
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asveikau
Updated on September 18, 2022Comments
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asveikau almost 2 years
I'm running Debian unstable. My
.asoundrc
looks like this:pcm.btheadset { type plug slave { pcm { type bluetooth device 5A:5A:5A:A6:08:09 profile "auto" } } } ctl.btheadset { type bluetooth }
I can play music through the headset, however I cannot control the volume.
$ alsamixer -D btheadset ALSA lib audio/ctl_bluetooth.c:167:(bluetooth_send_ctl) Unable to receive new volume value from server ALSA lib audio/ctl_bluetooth.c:161:(bluetooth_send_ctl) Unable to request new volume value to server: Broken pipe cannot load mixer controls: Broken pipe
daemon.log
has this:bluetoothd[15628]: Invalid message: length mismatch
Any ideas? I suspected this may be some mismatch of binaries, so I tried downgrading
bluez
to Debian stable. No luck. Maybe I should try the same with alsa libs...A lot of FAQs and tutorials suggest that PulseAudio should automatically solve this, however I installed it, it pulled down dozens of dependencies I have no interest in, and turned out to be a very user-hostile daemon that refused to play any sound at all. So I am not interested in that as a solution.
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CL. almost 11 yearsYou are invoking alsamixer correctly. Does your headset actually have mixer controls? This might be a bug in the bluetooth plugin.
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asveikau almost 11 years@CL. - Not sure if the hardware supports it or not, or if it's a bug, but I've just discovered the "
softvol
" pcm type so now I'm happy.
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