<!--
{
  "availability" : [
    "iOS: 9.0.0 -",
    "iPadOS: 9.0.0 -",
    "macCatalyst: 13.1.0 -",
    "macOS: 10.11.0 -",
    "tvOS: 9.0.0 -",
    "visionOS: 1.0.0 -"
  ],
  "documentType" : "symbol",
  "framework" : "AudioToolbox",
  "identifier" : "/documentation/AudioToolbox/AUAudioUnitBusArray/removeObserver(fromAllBusses:forKeyPath:context:)",
  "metadataVersion" : "0.1.0",
  "role" : "Instance Method",
  "symbol" : {
    "kind" : "Instance Method",
    "modules" : [
      "Audio Toolbox"
    ],
    "preciseIdentifier" : "c:objc(cs)AUAudioUnitBusArray(im)removeObserverFromAllBusses:forKeyPath:context:"
  },
  "title" : "removeObserver(fromAllBusses:forKeyPath:context:)"
}
-->

# removeObserver(fromAllBusses:forKeyPath:context:)

Removes a KVO observer for a given property on all busses in the array.

```
func removeObserver(fromAllBusses observer: NSObject, forKeyPath keyPath: String, context: UnsafeMutableRawPointer?)
```

## Parameters

`observer`

The KVO observer.

`keyPath`

The property’s key path.

`context`

The KVO context.

## Discussion

---

Copyright &copy; 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)