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# vDSP_destroy_fftsetupD

Deallocates an existing double-precision FFT setup structure.

```
extern void vDSP_destroy_fftsetupD(FFTSetupD __setup);
```

## Parameters

`__setup`

The setup structure to deallocate, previously created by <doc://com.apple.documentation/documentation/kernel/1580009-vdsp_create_fftsetup>.

## Discussion

`vDSP_destroy_fftsetup` frees existing setup data and releases any allocated memory.

---

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