# AudioFileGetPropertyInfo(_:_:_:_:) Gets information about an audio file property, including the size of the property value and whether the value is writable. ``` func AudioFileGetPropertyInfo(_ inAudioFile: AudioFileID, _ inPropertyID: AudioFilePropertyID, _ outDataSize: UnsafeMutablePointer?, _ isWritable: UnsafeMutablePointer?) -> OSStatus ``` ## Parameters `inAudioFile` The audio file you want to obtain property value information from. `inPropertyID` The property whose value information you want. See [Audio File Properties](/documentation/AudioToolbox/1576499-audio-file-properties) for possible values. `outDataSize` On output, the size in bytes of the property value. `isWritable` On output, equals `1` if the property is writable, or `0` if it is read-only. ## Return Value A result code. See Result Codes. ## Discussion --- Copyright © 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)