audioaccessorykit
AudioAccessoryKit
Automatic audio switching and intelligent audio routing for third-party audio accessories. Enables companion apps to register audio accessories with the system, report device placement, and declare capabilities so the system can seamlessly switch audio output. Available iOS 26.4+ / Swift 6.3.
Beta-sensitive. AudioAccessoryKit is new in iOS 26.4 and may change before GM. Re-check current Apple documentation before relying on specific API details.
AudioAccessoryKit builds on top of AccessorySetupKit. The accessory must first
be paired via AccessorySetupKit before it can be registered for audio features.
The central type is AccessoryControlDevice, which manages registration,
capability declaration, and ongoing state updates.
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