PipeWire

Tools

• pw-record & pw-play - capture and play sound
• qpwgraph - visual tool for making links between ports
  
• pw-dot - dump graph as dot file: pw-dot && dot -T svg -O pw.dot && firefox pw.dot.svg
• pavucontrol - PulseAudio mixer GUI
  
• pw-dump - writes JSON representation of nodes, links and ports
  
• pw-top - stats

Playback over SSH

pw-record --target 56 - | ssh ann XDG_RUNTIME_DIR=/run/user/hxd pw-play -

Where 56 is ID of output monitor named alsa_output.pci-0000_00_1f.3.analog-stereo in my case.

pw-dump | jq '.[] | select(.info.props."node.name" == "alsa_output.pci-0000_00_1f.3.analog-stereo").id'
pw-dump | jq '.[] | select(.info.props."node.description" == "Built-in Audio Analog Stereo" and .info.props."api.alsa.pcm.stream" == "playback").id'
pw-dump | jq '.[] | select(.info.props."device.profile.name" == "analog-stereo" and .info.props."api.alsa.pcm.stream" == "playback").id'

Full script can look like this:

#!/bin/fish
pw-record --target (pw-dump | jq '.[] | select(.info.props."device.profile.name" == "analog-stereo" and .info.props."api.alsa.pcm.stream" == "playback").id') - | ssh ann XDG_RUNTIME_DIR=/run/user/hxd pw-play -