Circle V2 API Docs
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    • Shared system-audio (loopback) controls for both the desktop tray and the web main window (when running inside Electron). Owns the toggle state, the macOS "Screen & System Audio Recording" permission status, and the loopback backend (Core Audio Tap vs. legacy ScreenCaptureKit "compatibility mode"), all via the preload-exposed window.electronAPI. It builds a capture strategy that mixes the mic with the system-audio loopback.

      Electron is detected after mount (so SSR / first render matches and the toggle is client-only). Outside Electron the hook is inert: systemAudio is undefined and the strategy is the mic-only default.

      Parameters

      Returns UseSystemAudioControlsReturn