AVEncoderBitRatePerChannelKey Declarationlet AVEncoderBitRatePerChannelKey: String See AlsoEncoder setting keysAVEncoderASPFrequencyKeyAVEncoderAudioQualityKeyAVEncoderBitDepthHintKeyAVEncoderBitRateKeyAVEncoderBitRateStrategyKeyAVEncoderContentSourceKeyAVEncoderDynamicRangeControlConfigurationKey