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# Audio Unit Parameter Flags

## Topics

### Constants

[`var kAudioUnitParameterFlag_Global: Int`](/documentation/AudioToolbox/kAudioUnitParameterFlag_Global)

[`var kAudioUnitParameterFlag_Group: Int`](/documentation/AudioToolbox/kAudioUnitParameterFlag_Group)

[`var kAudioUnitParameterFlag_Input: Int`](/documentation/AudioToolbox/kAudioUnitParameterFlag_Input)

[`var kAudioUnitParameterFlag_Output: Int`](/documentation/AudioToolbox/kAudioUnitParameterFlag_Output)


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