---
title: Deprecated Symbols
framework: audiotoolbox
role: collectionGroup
role_heading: API Collection
path: audiotoolbox/deprecated-symbols
---

# Deprecated Symbols

Review unsupported symbols and their replacements.

## Topics

### Inter-App Audio

- [AudioOutputUnitPublish(_:_:_:_:)](audiotoolbox/audiooutputunitpublish(_:_:_:_:).md)
- [AudioOutputUnitGetHostIcon(_:_:)](audiotoolbox/audiooutputunitgethosticon(_:_:).md)
- [AudioComponentGetIcon(_:_:)](audiotoolbox/audiocomponentgeticon(_:).md)
- [AudioComponentGetLastActiveTime(_:)](audiotoolbox/audiocomponentgetlastactivetime(_:).md)

### Functions

- [AudioFileReadPackets(_:_:_:_:_:_:_:)](audiotoolbox/audiofilereadpackets(_:_:_:_:_:_:_:).md)
- [AudioComponentGetIcon(_:_:)](audiotoolbox/audiocomponentgeticon(_:).md)
- [AudioComponentGetLastActiveTime(_:)](audiotoolbox/audiocomponentgetlastactivetime(_:).md)
- [AudioHardwareServiceAddPropertyListener(_:_:_:_:)](audiotoolbox/audiohardwareserviceaddpropertylistener(_:_:_:_:).md)
- [AudioHardwareServiceGetPropertyData(_:_:_:_:_:_:)](audiotoolbox/audiohardwareservicegetpropertydata(_:_:_:_:_:_:).md)
- [AudioHardwareServiceGetPropertyDataSize(_:_:_:_:_:)](audiotoolbox/audiohardwareservicegetpropertydatasize(_:_:_:_:_:).md)
- [AudioHardwareServiceHasProperty(_:_:)](audiotoolbox/audiohardwareservicehasproperty(_:_:).md)
- [AudioHardwareServiceIsPropertySettable(_:_:_:)](audiotoolbox/audiohardwareserviceispropertysettable(_:_:_:).md)
- [AudioHardwareServiceRemovePropertyListener(_:_:_:_:)](audiotoolbox/audiohardwareserviceremovepropertylistener(_:_:_:_:).md)
- [AudioHardwareServiceSetPropertyData(_:_:_:_:_:_:)](audiotoolbox/audiohardwareservicesetpropertydata(_:_:_:_:_:_:).md)
- [AudioOutputUnitGetHostIcon(_:_:)](audiotoolbox/audiooutputunitgethosticon(_:_:).md)
- [AudioOutputUnitPublish(_:_:_:_:)](audiotoolbox/audiooutputunitpublish(_:_:_:_:).md)
- [AudioSessionAddPropertyListener(_:_:_:)](audiotoolbox/audiosessionaddpropertylistener(_:_:_:).md)
- [AudioSessionGetProperty(_:_:_:)](audiotoolbox/audiosessiongetproperty(_:_:_:).md)
- [AudioSessionGetPropertySize(_:_:)](audiotoolbox/audiosessiongetpropertysize(_:_:).md)
- [AudioSessionInitialize(_:_:_:_:)](audiotoolbox/audiosessioninitialize(_:_:_:_:).md)
- [AudioSessionRemovePropertyListener(_:)](audiotoolbox/audiosessionremovepropertylistener(_:).md)
- [AudioSessionRemovePropertyListenerWithUserData(_:_:_:)](audiotoolbox/audiosessionremovepropertylistenerwithuserdata(_:_:_:).md)
- [AudioSessionSetActive(_:)](audiotoolbox/audiosessionsetactive(_:).md)
- [AudioSessionSetActiveWithFlags(_:_:)](audiotoolbox/audiosessionsetactivewithflags(_:_:).md)
- [AudioSessionSetProperty(_:_:_:)](audiotoolbox/audiosessionsetproperty(_:_:_:).md)

### Callbacks

- [AudioSessionInterruptionListener](audiotoolbox/audiosessioninterruptionlistener.md)
- [AudioSessionPropertyListener](audiotoolbox/audiosessionpropertylistener.md)

### Data Types

- [ExtendedControlEvent](audiotoolbox/extendedcontrolevent.md)
- [MIDIEndpointRef](coremidi/midiendpointref.md)
- [MagicCookieInfo](audiotoolbox/magiccookieinfo.md)
- [NoteInstanceID](audiotoolbox/noteinstanceid.md)
- [ReadBytesFDF](audiotoolbox/readbytesfdf.md)
- [ReadPacketDataFDF](audiotoolbox/readpacketdatafdf.md)
- [ReadPacketsFDF](audiotoolbox/readpacketsfdf.md)
- [SetPropertyFDF](audiotoolbox/setpropertyfdf.md)
- [SetUserDataFDF](audiotoolbox/setuserdatafdf.md)
- [WriteBytesFDF](audiotoolbox/writebytesfdf.md)
- [WritePacketsFDF](audiotoolbox/writepacketsfdf.md)
- [AudioSessionPropertyID](audiotoolbox/audiosessionpropertyid.md)

### Constants

- [Audio Unit Attenuation Properties](audiotoolbox/1534112-audio-unit-attenuation-propertie.md)
- [Audio Unit Instrument Errors](audiotoolbox/1584141-audio-unit-instrument-errors.md)
- [Anonymous](audiotoolbox/1534019-anonymous.md)
- [Anonymous](audiotoolbox/1534074-anonymous.md)
- [Audio Graph Errors](audiotoolbox/1537630-audio-graph-errors.md)
- [Audio Converter Property ID](audiotoolbox/1624333-audio-converter-property-id.md)
- [Anonymous](audiotoolbox/1621044-anonymous.md)
- [Anonymous](audiotoolbox/1618426-anonymous.md)
- [Anonymous](audiotoolbox/1618742-anonymous.md)
- [Anonymous](audiotoolbox/1619479-anonymous.md)
- [Anonymous](audiotoolbox/1619504-anonymous.md)
- [Anonymous](audiotoolbox/1533960-anonymous.md)
- [Anonymous](audiotoolbox/1534225-anonymous.md)
- [Music Device Properties](audiotoolbox/1534089-music-device-properties.md)
- [3D Mixer Audio Unit Properties](audiotoolbox/1534063-3d_mixer_audio_unit_properties.md)
- [kAudioSession_AudioRouteChangeKey_OldRoute](audiotoolbox/kaudiosession_audioroutechangekey_oldroute.md)
- [AU_SUPPORT_INTERAPP_AUDIO](audiotoolbox/au_support_interapp_audio.md)
- [Hardware Codec Capabilities](audiotoolbox/1620452-hardware-codec-capabilities.md)
- [Deprecated Audio Codec Properties](audiotoolbox/1494107-deprecated-audio-codec-propertie.md)
- [Deprecated Constants Used With kAudioCodecBitRateFormat](audiotoolbox/1494081-deprecated-constants-used-with-k.md)
- [Deprecated Constants Used With kAudioCodecOutputPrecedence](audiotoolbox/1494070-deprecated-constants-used-with-k.md)
- [Deprecated Constants Used With kAudioSettings_Hint](audiotoolbox/1494142-deprecated-constants-used-with-k.md)
- [Deprecated Audio Session Categories](audiotoolbox/1618459-deprecated-audio-session-categor.md)

### Audio Graphs

- [Audio Unit Processing Graph Services](audiotoolbox/audio-unit-processing-graph-services.md)