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# FFTRadix

The radix of the FFT decomposition.

```
typealias FFTRadix = Int32
```

## Discussion

Pass an `FFTRadix` value as an argument to <doc://com.apple.documentation/documentation/kernel/1580009-vdsp_create_fftsetup> or [`vDSP_create_fftsetupD`](/documentation/Accelerate/vDSP_create_fftsetupD).

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