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# FFTSetupD

An opaque type that contains setup information for a double-precision FFT transform.

```
typealias FFTSetupD = OpaquePointer
```

## Discussion

Call the [`vDSP_create_fftsetupD`](/documentation/Accelerate/vDSP_create_fftsetupD) function to create a setup structure, and calll [`vDSP_destroy_fftsetupD`](/documentation/Accelerate/vDSP_destroy_fftsetupD) to deallocate a setup structure.

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