AVFoundation macOS

AVFoundation is Apple's comprehensive media framework for macOS (and iOS). It handles audio/video capture, playback, recording, real-time processing, and effects. AVFoundation is used internally by professional Apple apps (Final Cut Pro, Logic Pro). It's powerful but low-level: you manage sessions, configure inputs/outputs, process buffers in real-time. Core components: AVCaptureSession (for recording), AVPlayer (for playback), AVAudioEngine (for audio processing), and Core Audio (lower-level audio API).