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# Core Audio Constants

## Topics

### Constants

[`#define AudioHardwareTapping_h`](/documentation/CoreAudio/AudioHardwareTapping_h)

[`#define CATapDescription_h`](/documentation/CoreAudio/CATapDescription_h)

[`var kAudioAggregateDeviceClockDeviceKey: String`](/documentation/CoreAudio/kAudioAggregateDeviceClockDeviceKey)

[`var kAudioAggregateDeviceIsPrivateKey: String`](/documentation/CoreAudio/kAudioAggregateDeviceIsPrivateKey)

[`var kAudioAggregateDeviceIsStackedKey: String`](/documentation/CoreAudio/kAudioAggregateDeviceIsStackedKey)

[`var kAudioAggregateDeviceMainSubDeviceKey: String`](/documentation/CoreAudio/kAudioAggregateDeviceMainSubDeviceKey)

[`var kAudioAggregateDeviceMasterSubDeviceKey: String`](/documentation/CoreAudio/kAudioAggregateDeviceMasterSubDeviceKey)

[`var kAudioAggregateDeviceNameKey: String`](/documentation/CoreAudio/kAudioAggregateDeviceNameKey)

[`var kAudioAggregateDevicePropertyMainSubDevice: AudioObjectPropertySelector`](/documentation/CoreAudio/kAudioAggregateDevicePropertyMainSubDevice)

[`var kAudioAggregateDevicePropertySubTapList: AudioObjectPropertySelector`](/documentation/CoreAudio/kAudioAggregateDevicePropertySubTapList)

[`var kAudioAggregateDevicePropertyTapList: AudioObjectPropertySelector`](/documentation/CoreAudio/kAudioAggregateDevicePropertyTapList)

[`var kAudioAggregateDeviceSubDeviceListKey: String`](/documentation/CoreAudio/kAudioAggregateDeviceSubDeviceListKey)

[`var kAudioAggregateDeviceTapAutoStartKey: String`](/documentation/CoreAudio/kAudioAggregateDeviceTapAutoStartKey)

[`var kAudioAggregateDeviceTapListKey: String`](/documentation/CoreAudio/kAudioAggregateDeviceTapListKey)

[`var kAudioAggregateDeviceUIDKey: String`](/documentation/CoreAudio/kAudioAggregateDeviceUIDKey)

[`kAudioDevicePropertyClockAlgorithm`](/documentation/CoreAudio/kAudioDevicePropertyClockAlgorithm)

[`kAudioDevicePropertyClockIsStable`](/documentation/CoreAudio/kAudioDevicePropertyClockIsStable)

[`var kAudioDevicePropertyIOThreadOSWorkgroup: AudioObjectPropertySelector`](/documentation/CoreAudio/kAudioDevicePropertyIOThreadOSWorkgroup)

The device’s workgroup object, which you use to coordinate your threads with the threads of the device.

[`var kAudioDevicePropertyProcessMute: AudioObjectPropertySelector`](/documentation/CoreAudio/kAudioDevicePropertyProcessMute)

[`var kAudioDevicePropertyVoiceActivityDetectionEnable: AudioObjectPropertySelector`](/documentation/CoreAudio/kAudioDevicePropertyVoiceActivityDetectionEnable)

[`var kAudioDevicePropertyVoiceActivityDetectionState: AudioObjectPropertySelector`](/documentation/CoreAudio/kAudioDevicePropertyVoiceActivityDetectionState)

[`kAudioDevicePropertyZeroTimeStampPeriod`](/documentation/CoreAudio/kAudioDevicePropertyZeroTimeStampPeriod)

[`var kAudioDeviceTransportTypeContinuityCapture: UInt32`](/documentation/CoreAudio/kAudioDeviceTransportTypeContinuityCapture)

[`var kAudioDeviceTransportTypeContinuityCaptureWired: UInt32`](/documentation/CoreAudio/kAudioDeviceTransportTypeContinuityCaptureWired)

[`var kAudioDeviceTransportTypeContinuityCaptureWireless: UInt32`](/documentation/CoreAudio/kAudioDeviceTransportTypeContinuityCaptureWireless)

[`var kAudioEndPointDeviceEndPointListKey: String`](/documentation/CoreAudio/kAudioEndPointDeviceEndPointListKey)

[`var kAudioEndPointDeviceIsPrivateKey: String`](/documentation/CoreAudio/kAudioEndPointDeviceIsPrivateKey)

[`var kAudioEndPointDeviceMainEndPointKey: String`](/documentation/CoreAudio/kAudioEndPointDeviceMainEndPointKey)

[`var kAudioEndPointDeviceMasterEndPointKey: String`](/documentation/CoreAudio/kAudioEndPointDeviceMasterEndPointKey)

[`var kAudioEndPointDeviceNameKey: String`](/documentation/CoreAudio/kAudioEndPointDeviceNameKey)

[`var kAudioEndPointDeviceUIDKey: String`](/documentation/CoreAudio/kAudioEndPointDeviceUIDKey)

[`var kAudioEndPointInputChannelsKey: String`](/documentation/CoreAudio/kAudioEndPointInputChannelsKey)

[`var kAudioEndPointNameKey: String`](/documentation/CoreAudio/kAudioEndPointNameKey)

[`var kAudioEndPointOutputChannelsKey: String`](/documentation/CoreAudio/kAudioEndPointOutputChannelsKey)

[`var kAudioEndPointUIDKey: String`](/documentation/CoreAudio/kAudioEndPointUIDKey)

[`var kAudioHardwareNotReadyError: OSStatus`](/documentation/CoreAudio/kAudioHardwareNotReadyError)

[`var kAudioHardwarePropertyProcessInputMute: AudioObjectPropertySelector`](/documentation/CoreAudio/kAudioHardwarePropertyProcessInputMute)

[`var kAudioHardwarePropertyProcessIsMain: AudioObjectPropertySelector`](/documentation/CoreAudio/kAudioHardwarePropertyProcessIsMain)

[`var kAudioHardwarePropertyProcessObjectList: AudioObjectPropertySelector`](/documentation/CoreAudio/kAudioHardwarePropertyProcessObjectList)

[`var kAudioHardwarePropertyTapList: AudioObjectPropertySelector`](/documentation/CoreAudio/kAudioHardwarePropertyTapList)

[`var kAudioHardwarePropertyTranslatePIDToProcessObject: AudioObjectPropertySelector`](/documentation/CoreAudio/kAudioHardwarePropertyTranslatePIDToProcessObject)

[`var kAudioHardwarePropertyTranslateUIDToTap: AudioObjectPropertySelector`](/documentation/CoreAudio/kAudioHardwarePropertyTranslateUIDToTap)

[`var kAudioHardwareRunLoopMode: String`](/documentation/CoreAudio/kAudioHardwareRunLoopMode)

[`kAudioObjectPlugInObject`](/documentation/CoreAudio/kAudioObjectPlugInObject)

[`kAudioObjectPropertyCustomPropertyInfoList`](/documentation/CoreAudio/kAudioObjectPropertyCustomPropertyInfoList)

[`var kAudioObjectPropertyElementMain: AudioObjectPropertyScope`](/documentation/CoreAudio/kAudioObjectPropertyElementMain)

[`kAudioPlugInPropertyResourceBundle`](/documentation/CoreAudio/kAudioPlugInPropertyResourceBundle)

[`var kAudioProcessClassID: AudioClassID`](/documentation/CoreAudio/kAudioProcessClassID)

[`kAudioServerPlugInCustomPropertyDataTypeCFPropertyList`](/documentation/CoreAudio/kAudioServerPlugInCustomPropertyDataTypeCFPropertyList)

[`kAudioServerPlugInCustomPropertyDataTypeCFString`](/documentation/CoreAudio/kAudioServerPlugInCustomPropertyDataTypeCFString)

[`kAudioServerPlugInCustomPropertyDataTypeNone`](/documentation/CoreAudio/kAudioServerPlugInCustomPropertyDataTypeNone)

[`#define kAudioServerPlugInDriverInterfaceUUID`](/documentation/CoreAudio/kAudioServerPlugInDriverInterfaceUUID)

[`kAudioServerPlugInHostClientID`](/documentation/CoreAudio/kAudioServerPlugInHostClientID)

[`#define kAudioServerPlugInTypeUUID`](/documentation/CoreAudio/kAudioServerPlugInTypeUUID)

[`var kAudioSubDeviceDriftCompensationKey: String`](/documentation/CoreAudio/kAudioSubDeviceDriftCompensationKey)

[`var kAudioSubDeviceDriftCompensationQualityKey: String`](/documentation/CoreAudio/kAudioSubDeviceDriftCompensationQualityKey)

[`var kAudioSubDeviceExtraInputLatencyKey: String`](/documentation/CoreAudio/kAudioSubDeviceExtraInputLatencyKey)

[`var kAudioSubDeviceExtraOutputLatencyKey: String`](/documentation/CoreAudio/kAudioSubDeviceExtraOutputLatencyKey)

[`var kAudioSubDeviceInputChannelsKey: String`](/documentation/CoreAudio/kAudioSubDeviceInputChannelsKey)

[`var kAudioSubDeviceNameKey: String`](/documentation/CoreAudio/kAudioSubDeviceNameKey)

[`var kAudioSubDeviceOutputChannelsKey: String`](/documentation/CoreAudio/kAudioSubDeviceOutputChannelsKey)

[`var kAudioSubDeviceUIDKey: String`](/documentation/CoreAudio/kAudioSubDeviceUIDKey)

[`var kAudioSubTapDriftCompensationKey: String`](/documentation/CoreAudio/kAudioSubTapDriftCompensationKey)

[`var kAudioSubTapDriftCompensationQualityKey: String`](/documentation/CoreAudio/kAudioSubTapDriftCompensationQualityKey)

[`var kAudioSubTapExtraInputLatencyKey: String`](/documentation/CoreAudio/kAudioSubTapExtraInputLatencyKey)

[`var kAudioSubTapExtraOutputLatencyKey: String`](/documentation/CoreAudio/kAudioSubTapExtraOutputLatencyKey)

[`var kAudioSubTapUIDKey: String`](/documentation/CoreAudio/kAudioSubTapUIDKey)


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