# AudioHardwareServiceGetPropertyDataSize(_:_:_:_:_:) Gets the payload size for a given property. ``` func AudioHardwareServiceGetPropertyDataSize(_ inObjectID: AudioObjectID, _ inAddress: UnsafePointer!, _ inQualifierDataSize: UInt32, _ inQualifierData: UnsafeRawPointer!, _ outDataSize: UnsafeMutablePointer!) -> OSStatus ``` ## Parameters `inObjectID` The HAL audio object to query. `inAddress` The property whose payload size you want. `inQualifierDataSize` A `UInt32` value indicating the size of the buffer pointed to by the `inQualifierData` parameter. Not all properties require qualification; in such a case you set this parameter to `0`. `inQualifierData` A buffer of data to be used in determining the value of the property being queried. Not all properties require qualification; in such a case you set this parameter to `NULL`. `outDataSize` A `UInt32` value indicating the size, in bytes, of the payload for the given property. ## Return Value A result code. ## See Also [`AudioHardwareServiceGetPropertyData`](/documentation/AudioToolbox/AudioHardwareServiceGetPropertyData(_:_:_:_:_:_:)) Gets the value for a specified property. --- 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)