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# Sample Rate Conversion Complexity Identifiers

Specifiers for the sample rate conversion algorithm, used for the [`kAudioConverterSampleRateConverterComplexity`](/documentation/AudioToolbox/kAudioConverterSampleRateConverterComplexity) property.

## Topics

### Constants

[`var kAudioConverterSampleRateConverterComplexity_Linear: UInt32`](/documentation/AudioToolbox/kAudioConverterSampleRateConverterComplexity_Linear)

Specifies linear interpolation for sample rate conversion. This provides the lowest quality and is, computationally, the least expensive option.

[`var kAudioConverterSampleRateConverterComplexity_Normal: UInt32`](/documentation/AudioToolbox/kAudioConverterSampleRateConverterComplexity_Normal)

Specifies the normal-complexity sample rate conversion algorithm. This is the default value.

[`var kAudioConverterSampleRateConverterComplexity_Mastering: UInt32`](/documentation/AudioToolbox/kAudioConverterSampleRateConverterComplexity_Mastering)

Specifies a mastering-quality sample rate conversion algorithm. This provides the highest quality and is, computationally, the most expensive option.

[`var kAudioConverterSampleRateConverterComplexity_MinimumPhase: UInt32`](/documentation/AudioToolbox/kAudioConverterSampleRateConverterComplexity_MinimumPhase)


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