---
title: Alternative Audio Route Change Reason Dictionary Key
framework: audiotoolbox
role: collectionGroup
role_heading: API Collection
path: audiotoolbox/alternative-audio-route-change-reason-dictionary-key
---

# Alternative Audio Route Change Reason Dictionary Key

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

## Overview

Overview Use these dictionary keys to obtain information, from the kAudioSessionProperty_AudioRouteChange property, about an audio hardware route change event.

## Topics

### Constants

- [kAudioSession_AudioRouteChangeKey_Reason](audiotoolbox/kaudiosession_audioroutechangekey_reason.md)

## See Also

### Audio Routes

- [Audio Route Change Reasons](audiotoolbox/1618380-audio-route-change-reasons.md)
- [Audio Route Description Dictionary Keys](audiotoolbox/audio-route-description-dictionary-keys.md)
- [Audio Route Type Key](audiotoolbox/audio-route-type-key.md)
- [Audio Input Routes](audiotoolbox/audio-input-routes.md)
- [Audio Output Routes](audiotoolbox/audio-output-routes.md)
- [Audio Route Change Dictionary Keys](audiotoolbox/audio-route-change-dictionary-keys.md)