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audioaccessorykit

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Support automatic audio switching for paired third-party Bluetooth headphones or earbuds with AudioAccessoryKit. Use when a companion app registers an audio accessory, an app extension reports worn/removed placement or connected source-device changes, or AccessoryControlDevice capabilities and errors need handling. Do not use for general AVAudioSession routing, Bluetooth transport, or initial accessory pairing.

When to use

• registering an audio accessory
• reporting worn/removed placement
• reporting connected source-device changes
• handling AccessoryControlDevice capabilities
• handling AccessoryControlDevice errors
• automatic audio switching
• intelligent audio routing inputs

When not to use

• general AVAudioSession routing
• Bluetooth transport
• initial accessory pairing

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