No output from PulseAudio loopback
by MALDATA from LinuxQuestions.org on (#4ZD8G)
Hi all,
There seems to be a lot of content on various forums about this exact problem, but I still can't get it sorted out. All I need is to plug a sound source into the computer's line-in, and then get the audio to come out on the line-out. PulseAudio is installed and working.
Here's one of many resources that says that the right tool for the job here is the loopback module:
https://www.pclinuxos.com/forum/inde...topic=147977.0
So, presumably all I need to do is
Code:$ pactl load-module module-loopback source=alsa_input.platform-sound.stereo-fallback sink=alsa_output.platform-sound.stereo-fallbackAnd then audio should get sent from the line-in to the line-out. After issuing this command, I can do
Code:$ pacmd list-source-outputs and Code:$ pacmd list-sink-inputs and it shows that both have a volume of 100%, are not muted, etc. Meanwhile, I can use paplay and hear a sound file get played over the speakers, so at least I know that part is working. I have also gone into alsamixer and unmuted all playback channels, then turned on all capture channels.
I'm a little restricted on this machine, in that there is no UI, so I can't use pavucontrol. But still, my pactl command looks ok to me, and I can't see any other reason for this to fail.
Anyone else have any thoughts on what might be the problem/how to get more diagnostic info?
Thanks!
There seems to be a lot of content on various forums about this exact problem, but I still can't get it sorted out. All I need is to plug a sound source into the computer's line-in, and then get the audio to come out on the line-out. PulseAudio is installed and working.
Here's one of many resources that says that the right tool for the job here is the loopback module:
https://www.pclinuxos.com/forum/inde...topic=147977.0
So, presumably all I need to do is
Code:$ pactl load-module module-loopback source=alsa_input.platform-sound.stereo-fallback sink=alsa_output.platform-sound.stereo-fallbackAnd then audio should get sent from the line-in to the line-out. After issuing this command, I can do
Code:$ pacmd list-source-outputs and Code:$ pacmd list-sink-inputs and it shows that both have a volume of 100%, are not muted, etc. Meanwhile, I can use paplay and hear a sound file get played over the speakers, so at least I know that part is working. I have also gone into alsamixer and unmuted all playback channels, then turned on all capture channels.
I'm a little restricted on this machine, in that there is no UI, so I can't use pavucontrol. But still, my pactl command looks ok to me, and I can't see any other reason for this to fail.
Anyone else have any thoughts on what might be the problem/how to get more diagnostic info?
Thanks!