macOS: CoreAudio
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Apple’s unified audio framework.
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Low-level + high-level layers.
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Callback-based audio units.
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Graph-based processing.
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Architecture layers
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HAL (Hardware Abstraction Layer)
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Audio Units (DSP nodes)
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AUGraph (graph system)
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Typical use today
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Everything on macOS/iOS.
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Engines, DAWs, games.
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