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# Alternative Audio Route Change Reason Dictionary Key

An alternate key for obtaining information about the reason for an audio route change.

## Discussion

Use these dictionary keys to obtain information, from the [`kAudioSessionProperty_AudioRouteChange`](/documentation/AudioToolbox/kAudioSessionProperty_AudioRouteChange) property, about an audio hardware route change event.

## Topics

### Constants

[`var kAudioSession_AudioRouteChangeKey_Reason: String`](/documentation/AudioToolbox/kAudioSession_AudioRouteChangeKey_Reason)

Identifies the reason for the audio route change.


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