Pick an audio source

PipeWire / JACK is the one that works on your setup. It captures through JACK, so it sees the Spotify desktop app, JACK routing, and anything else the machine plays.

Share publishes this device's mic or tab audio instead, so a phone or another laptop can be the source. Note a phone browser cannot capture other apps — only its microphone.

Needs the bridge running:

python3 server/bridge.py

Tab audio only works for a single Chrome tab with "Share tab audio" ticked — never whole-screen, and never a desktop app. Sweep plays semitones one at a time to verify the axis.