---
title: FFTRadix
framework: Kernel
role: symbol
role_heading: Type Alias
platforms: [macOS 10.13+]
path: kernel/fftradix
---

# FFTRadix

The size of the FFT decomposition.

## Declaration

```occ
typedef int FFTRadix;
```

## Discussion

Discussion An FFTRadix value is passed as an argument to vDSP_create_fftsetup or vDSP_create_fftsetupD.

## Topics

### Constants

- [kFFTRadix5](kernel/1645051-anonymous/kfftradix5.md)