Audio settings Configure audio processing settings using standard key and value constants. TopicsFormat and layout keysAVChannelLayoutKeyLinear PCM format settingsFormat settingsEncoder and processing settingsSample rate conversion settingsAVAudioQualityEncoder settingsTime pitch algorithm settingsBit rate strategiesEncoder bit rate strategy values See AlsoAudio dataAVAudioFileAVAudioPCMBufferAVAudioCompressedBufferAVReadOnlyAudioPCMBufferAVAudioBufferAVAudioFormatAVAudioChannelLayoutAVAudioConverterAVAudioTime