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# Encoder Bit Rate Strategy Values

The constants that represent the possible bit rate strategy values.

## Discussion

You use these values with [`AVEncoderBitRateStrategyKey`](/documentation/AVFAudio/AVEncoderBitRateStrategyKey).

## Topics

### Strategies

[`let AVAudioBitRateStrategy_Constant: String`](/documentation/AVFAudio/AVAudioBitRateStrategy_Constant)

A value that represents a constant bit rate strategy.

[`let AVAudioBitRateStrategy_LongTermAverage: String`](/documentation/AVFAudio/AVAudioBitRateStrategy_LongTermAverage)

A value that represents an average bit rate strategy.

[`let AVAudioBitRateStrategy_VariableConstrained: String`](/documentation/AVFAudio/AVAudioBitRateStrategy_VariableConstrained)

A value that represents a constrained variable bit rate strategy.

[`let AVAudioBitRateStrategy_Variable: String`](/documentation/AVFAudio/AVAudioBitRateStrategy_Variable)

A value that represents a variable bit rate strategy.


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