Capture is a dashcam for audio. It is always listening: the most recent stretch of sound sits in memory, so the moment you just played is already recorded. Press save and it writes to disk.
You set how far back it reaches, from 30 seconds up to a full hour. You never arm a recording. You decide what to keep after you hear it.
It is also an MCP server. An agent can drive the live app over 13 tools: transport, buffer, gain, calibration, status. Agent Control below covers the full surface.