# kAudioUnitProperty_ParameterValueStrings An array of names for a named, indexed audio unit parameter. An indexed parameter is one whose unit type is [`AudioUnitParameterUnit.indexed`](/documentation/AudioToolbox/AudioUnitParameterUnit/indexed). The array’s strings can be used to build a menu for the parameter. ``` var kAudioUnitProperty_ParameterValueStrings: AudioUnitPropertyID { get } ``` ## Discussion A read-only object whose elements are objects, valid on any audio unit scope. When obtaining a parameter string array from an audio unit with the [`AudioUnitGetProperty(_:_:_:_:_:_:)`](/documentation/AudioToolbox/AudioUnitGetProperty(_:_:_:_:_:_:)) function, you own the reference to the array and are responsible for later releasing it by calling the function. Indexed parameters use whole-number index values; the size of this property’s array should be the same as the range between the parameter’s minimum and maximum values. --- 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)