grava

grava captures desktop playback through the PulseAudio protocol, including PipeWire's PulseAudio compatibility server, and draws animated Chladni sand figures in your terminal. Includes themes, live configuration reload, deterministic demo synthesis, and raw PCM input from stdin or a FIFO.

After installation, enable desktop audio capture with sudo snap connect grava:audio-record.

Run grava to visualize playback, or try grava -i demo without an audio server.