# AudioSessionGetPropertySize(_:_:) Gets the size of the value for a specified audio session property. ``` func AudioSessionGetPropertySize(_ inID: AudioSessionPropertyID, _ outDataSize: UnsafeMutablePointer!) -> OSStatus ``` ## Parameters `inID` The identifier for the audio session property whose value you want to get the size of. `outDataSize` On output, the size of the property value. ## 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). ## See Also [`AudioSessionGetProperty`](/documentation/AudioToolbox/AudioSessionGetProperty(_:_:_:)) Gets the value of 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)