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  "title" : "Music Effect and Instrument Unit Properties"
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# Music Effect and Instrument Unit Properties

## Topics

### Constants

[`var kAudioUnitProperty_AddParameterMIDIMapping: AudioUnitPropertyID`](/documentation/AudioToolbox/kAudioUnitProperty_AddParameterMIDIMapping)

[`var kAudioUnitProperty_AllParameterMIDIMappings: AudioUnitPropertyID`](/documentation/AudioToolbox/kAudioUnitProperty_AllParameterMIDIMappings)

[`var kAudioUnitProperty_HotMapParameterMIDIMapping: AudioUnitPropertyID`](/documentation/AudioToolbox/kAudioUnitProperty_HotMapParameterMIDIMapping)

[`var kAudioUnitProperty_RemoveParameterMIDIMapping: AudioUnitPropertyID`](/documentation/AudioToolbox/kAudioUnitProperty_RemoveParameterMIDIMapping)


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