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# Audio Unit Filter Parameters

## Topics

### Constants

[`var kMultibandFilter_Bandwidth1: AudioUnitParameterID`](/documentation/AudioToolbox/kMultibandFilter_Bandwidth1)

[`var kMultibandFilter_Bandwidth2: AudioUnitParameterID`](/documentation/AudioToolbox/kMultibandFilter_Bandwidth2)

[`var kMultibandFilter_Bandwidth3: AudioUnitParameterID`](/documentation/AudioToolbox/kMultibandFilter_Bandwidth3)

[`var kMultibandFilter_CenterFreq1: AudioUnitParameterID`](/documentation/AudioToolbox/kMultibandFilter_CenterFreq1)

[`var kMultibandFilter_CenterFreq2: AudioUnitParameterID`](/documentation/AudioToolbox/kMultibandFilter_CenterFreq2)

[`var kMultibandFilter_CenterFreq3: AudioUnitParameterID`](/documentation/AudioToolbox/kMultibandFilter_CenterFreq3)

[`var kMultibandFilter_CenterGain1: AudioUnitParameterID`](/documentation/AudioToolbox/kMultibandFilter_CenterGain1)

[`var kMultibandFilter_CenterGain2: AudioUnitParameterID`](/documentation/AudioToolbox/kMultibandFilter_CenterGain2)

[`var kMultibandFilter_CenterGain3: AudioUnitParameterID`](/documentation/AudioToolbox/kMultibandFilter_CenterGain3)

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

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

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

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

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

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


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