Core Audio

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Core Audio is Apple’s low-level sound API for macOS and iOS. It was released in 2003 and is provided as a proprietary developer library. The API includes an implementation of OpenAL, a cross‑platform audio technology. Apple designed Core Audio to deliver high‑quality audio on Macs and to take over the responsibility for audio and MIDI services that developers would otherwise have to implement in their apps. Core Audio first appeared with Mac OS X 10.0 (Cheetah). It supports plugins—bundles with the .component extension—that can generate, receive, or process audio streams.