# AudioSessionGetProperty(_:_:_:) Gets the value of a specified audio session property. ``` func AudioSessionGetProperty(_ inID: AudioSessionPropertyID, _ ioDataSize: UnsafeMutablePointer!, _ outData: UnsafeMutableRawPointer!) -> OSStatus ``` ## Parameters `inID` The identifier for the audio session property that you want to get the value of. `ioDataSize` On input, the memory size for the `outData` parameter. On output, the actual size of the property value. `outData` On output, the value of the specified audio session property. ## Return Value A result code. See Result Codes. ## Discussion Audio session properties are listed and described in [Audio Session Property Identifiers](/documentation/AudioToolbox/1618455-audio-session-property-identifie). ### 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). ## See Also [`AudioSessionGetPropertySize(_:_:)`](/documentation/AudioToolbox/AudioSessionGetPropertySize(_:_:)) Gets the size of the value for a specified audio session property. [`AudioSessionSetProperty(_:_:_:)`](/documentation/AudioToolbox/AudioSessionSetProperty(_:_:_:)) Sets the value of a specified audio session 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)