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# Encoder settings

The constants that define the audio encoder settings for the audio recorder class.

## Topics

### Settings

  <doc://com.apple.documentation/documentation/AVFAudio/AVEncoderAudioQualityKey>

  <doc://com.apple.documentation/documentation/AVFAudio/AVEncoderBitRateKey>

  <doc://com.apple.documentation/documentation/AVFAudio/AVEncoderBitRatePerChannelKey>

  <doc://com.apple.documentation/documentation/AVFAudio/AVEncoderBitRateStrategyKey>

  <doc://com.apple.documentation/documentation/AVFAudio/AVEncoderBitDepthHintKey>


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