# AudioFileGetGlobalInfoSize(_:_:_:_:) Gets the size of a global audio file property. ``` func AudioFileGetGlobalInfoSize(_ inPropertyID: AudioFilePropertyID, _ inSpecifierSize: UInt32, _ inSpecifier: UnsafeMutableRawPointer?, _ outDataSize: UnsafeMutablePointer) -> OSStatus ``` ## Parameters `inPropertyID` The property whose data size you want to get. For possible values, see [Audio File Global Info Properties](/documentation/AudioToolbox/1576495-audio-file-global-info-propertie). `inSpecifierSize` The size of the specifier data. `inSpecifier` A pointer to a *specifier* (a pointer to a buffer containing some data which is different for each property. The type of the data required is described in the description of each property.) `outDataSize` A pointer to the size in bytes of the current value of the property. To get the size of the property value, you need a buffer of this size. ## Return Value A result code. See Result Codes. ## Discussion This function can be used to get information about the capabilities of Audio File Service data types, for example, to determine which file types can take which data formats. --- 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)