1

I have an app that only supports Alsa, and I want to route its audio to a Bluetooth speaker. I'm attempting to use Pulseaudio to do it if that is possible.

The Bluetooth speaker is paired and I can play system audio to it. The app in question only lists hardware playback devices per what is shown in aplay -l and I'm using plughw0,0 bcm2835 ALSA. Pulseaudio doesn't seem to see the playback, so I can't route the audio anywhere.

aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: ALSA [bcm2835 ALSA], device 0: bcm2835 ALSA [bcm2835 ALSA]
  Subdevices: 5/7
  Subdevice #0: subdevice #0
  Subdevice #1: subdevice #1
  Subdevice #2: subdevice #2
  Subdevice #3: subdevice #3
  Subdevice #4: subdevice #4
  Subdevice #5: subdevice #5
  Subdevice #6: subdevice #6
card 0: ALSA [bcm2835 ALSA], device 1: bcm2835 IEC958/HDMI [bcm2835 IEC958/HDMI]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: ALSA [bcm2835 ALSA], device 2: bcm2835 IEC958/HDMI1 [bcm2835 IEC958/HDMI1]
  Subdevices: 1/1
  Subdevice #0: subdevice #0

pactl list sinks short only gives me one sink with a default /etc/pulse/default.pa:

0   alsa_output.platform-soc_audio.analog-mono  module-alsa-card.c  s16le 1ch 44100Hz   RUNNING

Shooting in the dark, I tried editing /etc/pulse/default.pa to include load-module module-alsa-sink device=plughw:0,0 in which case I see a corresponding sink and monitor source:

pactl list sinks short
0   alsa_output.plughw_0_0  module-alsa-sink.c  s16le 2ch 44100Hz   IDLE

pactl list sources short
0   alsa_output.plughw_0_0.monitor  module-alsa-sink.c  s16le 2ch 44100Hz   RUNNING

I see these in pavucontrol, but the corresponding source Monitor of Built-in Audio is not seeing any sound from the application.

I might be going about this the wrong way, but I think I should be able to play a monitor of my plughw0,0 bcm2835 ALSA on my bluetooth output device. I also had a quick try doing this with Jack to no avail.

Any ideas would be appreciated.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Browse other questions tagged or ask your own question.