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# vDSP_deq22D

Performs two-pole two-zero recursive filtering on a double-precision vector.

```
extern void vDSP_deq22D(const double *__A, vDSP_Stride __IA, const double *__B, double *__C, vDSP_Stride __IC, vDSP_Length __N);
```

## Discussion

This function is the same as <doc://com.apple.documentation/documentation/kernel/1532225-vdsp_deq22>, except for the types of vectors `A`, `B`, and `C`..

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