Module loopback 

System-audio loopback capture.

Exposes the same crate::audio::capture::CaptureHandle shape as the mic path so the rest of the pipeline (resampler → engine) is agnostic.

• macOS: ScreenCaptureKit audio-only capture (see loopback_macos).
• Windows / Linux: not yet wired — returns an explanatory error so the UI can surface it as a banner.

Functions

capture_app

Capture audio produced by a single application, identified by bundle identifier on macOS or PID on Windows. Returns the same CaptureHandle shape as the mic and system loopback paths so the rest of the pipeline (resampler → engine) is agnostic.

capture_loopback

Capture system audio playing on the output device name. If name is None, captures the default output.