# AudioQueueGetProperty(_:_:_:_:) Gets an audio queue property value. ``` func AudioQueueGetProperty(_ inAQ: AudioQueueRef, _ inID: AudioQueuePropertyID, _ outData: UnsafeMutableRawPointer, _ ioDataSize: UnsafeMutablePointer) -> OSStatus ``` ## Parameters `inAQ` The audio queue that you want to get a property value from. `inID` The ID of the property whose value you want to get. See [`AudioQueuePropertyID`](/documentation/AudioToolbox/AudioQueuePropertyID). `outData` On output, the desired property value. `ioDataSize` On input, the maximum bytes of space the caller expects to receive. On output, the actual data size of the property value. ## Return Value A result code. See Result Codes. ## Discussion Before calling this function, you can use the [`AudioQueueGetPropertySize(_:_:_:)`](/documentation/AudioToolbox/AudioQueueGetPropertySize(_:_:_:)) function to determine the size, in bytes, of the value of a specified property. Some properties have values of a specific size, as described in [`AudioQueuePropertyID`](/documentation/AudioToolbox/AudioQueuePropertyID). ### Special Considerations Some Core Audio property values are C types and others are Core Foundation objects. If you call this function to retrieve a value that is a Core Foundation object, then this function—despite the use of “Get” in its name—duplicates the object. You are responsible for releasing the object, as described in [The Create Rule](https://developer.apple.com/library/archive/documentation/CoreFoundation/Conceptual/CFMemoryMgmt/Concepts/Ownership.html#//apple_ref/doc/uid/20001148-103029) in [Memory Management Programming Guide for Core Foundation](https://developer.apple.com/library/archive/documentation/CoreFoundation/Conceptual/CFMemoryMgmt/CFMemoryMgmt.html#//apple_ref/doc/uid/10000127i). --- 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)