Auto color evolves every ~80 seconds and responds to likely song boundaries. A track hint makes a deliberate color change.
Sound stirs the fluid. Preview: C for spines · T for fine quills · D for a downward pull · O for an outward pull.
Play music, then choose where the sound comes from.
In Chrome or Edge, pick your Spotify or YouTube tab and enable “Share tab audio.”
Listen through a microphone, or route your Mac’s audio through BlackHole.
Install BlackHole 2ch. In Audio MIDI Setup, make a Multi-Output Device with your speakers/headphones and BlackHole. Use that as your Mac’s output, then choose BlackHole here as the input. Setup guide ↗
Audio stays on your device. No accounts. No uploads.