---
title: Inter-App Output Unit Property IDs
framework: audiotoolbox
role: collectionGroup
role_heading: API Collection
path: audiotoolbox/1621039-inter-app-output-unit-property-ids
---

# Inter-App Output Unit Property IDs

## Topics

### Constants

- [kAudioOutputUnitProperty_MIDICallbacks](audiotoolbox/kaudiooutputunitproperty_midicallbacks.md)
- [kAudioOutputUnitProperty_HostReceivesRemoteControlEvents](audiotoolbox/kaudiooutputunitproperty_hostreceivesremotecontrolevents.md)
- [kAudioOutputUnitProperty_RemoteControlToHost](audiotoolbox/kaudiooutputunitproperty_remotecontroltohost.md)
- [kAudioOutputUnitProperty_HostTransportState](audiotoolbox/kaudiooutputunitproperty_hosttransportstate.md)
- [kAudioOutputUnitProperty_NodeComponentDescription](audiotoolbox/kaudiooutputunitproperty_nodecomponentdescription.md)

## See Also

### Input/Output

- [I/O Audio Unit Properties](audiotoolbox/1534116-i_o_audio_unit_properties.md)
- [Inter-App Audio Unit Property IDs](audiotoolbox/1621038-inter-app-audio-unit-property-ids.md)
- [Output Unit Parameters](audiotoolbox/1389916-output_unit_parameters.md)
- [AUNetReceive Properties](audiotoolbox/1534109-aunetreceive-properties.md)
- [AUNetSend Properties](audiotoolbox/1534207-aunetsend-properties.md)
- [AUNetSend Parameters](audiotoolbox/1389633-aunetsend-parameters.md)
- [AUNetReceive Parameters](audiotoolbox/1389920-aunetreceive-parameters.md)
- [AUNetSendPresetFormat Properties](audiotoolbox/1534212-aunetsendpresetformat-properties.md)
- [Net Status Audio Unit Parameters](audiotoolbox/1389891-net-status-audio-unit-parameters.md)
- [I/O Audio Unit Function Selectors](audiotoolbox/1585807-i_o_audio_unit_function_selector.md)
- [AudioOutputUnitMIDICallbacks](audiotoolbox/audiooutputunitmidicallbacks.md)
- [AudioOutputUnitStartAtTimeParams](audiotoolbox/audiooutputunitstartattimeparams.md)