---
title: "AudioFileRemoveUserData(_:_:_:)"
framework: audiotoolbox
role: symbol
role_heading: Function
path: "audiotoolbox/audiofileremoveuserdata(_:_:_:)"
---

# AudioFileRemoveUserData(_:_:_:)

Removes a user data item from an audio file.

## Declaration

```swift
func AudioFileRemoveUserData(_ inAudioFile: AudioFileID, _ inUserDataID: UInt32, _ inIndex: UInt32) -> OSStatus
```

## Parameters

- `inAudioFile`: The audio file that contains the user data item you want to remove.
- `inUserDataID`: The four-character code such as COMM of the user data item.
- `inIndex`: An index specifying the chunk to remove. Use this parameter if the file contains more than one user data item with the four-character code that you specified in the inUserDataID parameter.

## Return Value

Return Value A result code if there’s an error (see Result Codes) or noErr if the operation succeeds.

## See Also

### Working with User Data

- [AudioFileCountUserData(_:_:_:)](audiotoolbox/audiofilecountuserdata(_:_:_:).md)
- [AudioFileGetUserDataSize(_:_:_:_:)](audiotoolbox/audiofilegetuserdatasize(_:_:_:_:).md)
- [AudioFileGetUserDataSize64(_:_:_:_:)](audiotoolbox/audiofilegetuserdatasize64(_:_:_:_:).md)
- [AudioFileGetUserData(_:_:_:_:_:)](audiotoolbox/audiofilegetuserdata(_:_:_:_:_:).md)
- [AudioFileGetUserDataAtOffset(_:_:_:_:_:_:)](audiotoolbox/audiofilegetuserdataatoffset(_:_:_:_:_:_:).md)
- [AudioFileSetUserData(_:_:_:_:_:)](audiotoolbox/audiofilesetuserdata(_:_:_:_:_:).md)