TOOL » LINUX » AUDIO

Pulseaudio

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Reference:wiki.archlinux.org

Overview ​

A general purpose sound server.

Install pulseaudio and pavucontrol.

List ​

List sources:

shell
pactl list sources | grep Name

Mono Audio ​

A new pulseaudio module must be added to have mono audio.

shell
pacmd list-sinks | sed -nE 's/^\s*name: <(alsa.+)>$/\1/p'  # Add output to $master bellow
load-module module-remap-sink sink_name=mono sink_properties="device.description='Mono'" master=$master channels=2 channel_map=mono,mono"

To apply it temporarily, prepend the command with pacmd and run in the terminal.

To apply it permanently, copy the command to the end of /etc/pulse/default.pa.

Choose between stereo and mono using pavucontrol in the Playback tab.

Combine sources ​

1) Create a null sink ​

shell
pactl load-module module-null-sink sink_name=mix

2) Connect sources to the null sink ​

shell
pactl load-module module-loopback sink=mix source=alsa_output.pci-0000_2f_00.4.analog-stereo.monitor
pactl load-module module-loopback sink=mix channels=2 channel_map=mono,mono source=alsa_input.pci-0000_2f_00.4.analog-stereo

The mix sink with have the audio of both sources.