# ExtAudioFileGetPropertyInfo(_:_:_:_:) Gets information about an extended audio file object property. ``` func ExtAudioFileGetPropertyInfo(_ inExtAudioFile: ExtAudioFileRef, _ inPropertyID: ExtAudioFilePropertyID, _ outSize: UnsafeMutablePointer?, _ outWritable: UnsafeMutablePointer?) -> OSStatus ``` ## Parameters `inExtAudioFile` The extended audio file object to get property information from. `inPropertyID` The property you want information about. `outSize` On output, the size of the property value in bytes. Can be `NULL` on output. `outWritable` On output, a Boolean value indicating whether the property value is writable (`true` means writable). Can be `NULL` on output. ## Return Value A result code. ## 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)