---
title: outputMuteStateChangeNotification
framework: avfaudio
role: symbol
role_heading: Type Property
path: avfaudio/avaudiosession/outputmutestatechangenotification
---

# outputMuteStateChangeNotification

Notification sent to registered listeners when session’s output mute state changes.

## Declaration

```swift
class let outputMuteStateChangeNotification: NSNotification.Name
```

## Discussion

Discussion The userInfo dictionary will contain the updated output mute value as accessed by muteStateKey

## See Also

### Configuring audio muting

- [isOutputMuted](avfaudio/avaudiosession/isoutputmuted.md)
- [setOutputMuted(_:)](avfaudio/avaudiosession/setoutputmuted(_:).md)
- [muteStateKey](avfaudio/avaudiosession/mutestatekey.md)
- [userIntentToUnmuteOutputNotification](avfaudio/avaudiosession/userintenttounmuteoutputnotification.md)
- [userIntentToUnmuteOutputNotification](avfaudio/avaudiosession/userintenttounmuteoutputnotification.md)
- [muteStateKey](avfaudio/avaudiosession/mutestatekey.md)