---
title: "removeParameterObserver(_:)"
framework: audiotoolbox
role: symbol
role_heading: Instance Method
path: "audiotoolbox/auparameternode/removeparameterobserver(_:)"
---

# removeParameterObserver(_:)

Remove a specific parameter observer.

## Declaration

```swift
func removeParameterObserver(_ token: AUParameterObserverToken)
```

## Parameters

- `token`: The token corresponding to the given observer.

## Discussion

Discussion This call will remove the callback corresponding to the given token. This operation blocks until any callbacks currently in progress have completed.

## See Also

### Observers

- [token(byAddingParameterObserver:)](audiotoolbox/auparameternode/token(byaddingparameterobserver:).md)
- [token(byAddingParameterRecordingObserver:)](audiotoolbox/auparameternode/token(byaddingparameterrecordingobserver:).md)
- [token(byAddingParameterAutomationObserver:)](audiotoolbox/auparameternode/token(byaddingparameterautomationobserver:).md)