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# Stereo Mixer Unit Parameters

## Topics

### Constants

[`var kStereoMixerParam_Pan: AudioUnitParameterID`](/documentation/AudioToolbox/kStereoMixerParam_Pan)

[`var kStereoMixerParam_PostAveragePower: AudioUnitParameterID`](/documentation/AudioToolbox/kStereoMixerParam_PostAveragePower)

[`var kStereoMixerParam_PostPeakHoldLevel: AudioUnitParameterID`](/documentation/AudioToolbox/kStereoMixerParam_PostPeakHoldLevel)

[`var kStereoMixerParam_PreAveragePower: AudioUnitParameterID`](/documentation/AudioToolbox/kStereoMixerParam_PreAveragePower)

[`var kStereoMixerParam_PrePeakHoldLevel: AudioUnitParameterID`](/documentation/AudioToolbox/kStereoMixerParam_PrePeakHoldLevel)

[`var kStereoMixerParam_Volume: AudioUnitParameterID`](/documentation/AudioToolbox/kStereoMixerParam_Volume)


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