Audio Unit Instrument Errors TopicsConstantskAudioUnitErr_IllegalInstrumentkAudioUnitErr_InstrumentTypeNotFound See AlsoConstantsAudio Unit Attenuation PropertiesAnonymousAnonymousAudio Graph ErrorsAudio Converter Property IDAnonymousAnonymousAnonymousAnonymousAnonymousAnonymousAnonymousMusic Device Properties3D Mixer Audio Unit PropertieskAudioSession_AudioRouteChangeKey_OldRoute