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# USB Accessory Audio Destination Dictionary Keys

Keys for the dictionaries in the [`kAudioSessionProperty_OutputDestinations`](/documentation/AudioToolbox/kAudioSessionProperty_OutputDestinations) array.

## Topics

### Constants

[`let kAudioSession_OutputDestinationKey_ID: CFString!`](/documentation/AudioToolbox/kAudioSession_OutputDestinationKey_ID)

The output destination.

[`let kAudioSession_OutputDestinationKey_Description: CFString!`](/documentation/AudioToolbox/kAudioSession_OutputDestinationKey_Description)

The audio output destination.


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