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# Cross-spectrum computation

Compute the element-wise product of a vector and the conjugate of a second vector.

## Topics

### Vector-to-Vector Spectra Computation

[`extern void vDSP_zcspec(const DSPSplitComplex *__A, const DSPSplitComplex *__B, const DSPSplitComplex *__C, vDSP_Length __N);`](/documentation/Accelerate/vDSP_zcspec)

Computes the cross-spectrum of two complex single-precision vectors.

[`extern void vDSP_zcspecD(const DSPDoubleSplitComplex *__A, const DSPDoubleSplitComplex *__B, const DSPDoubleSplitComplex *__C, vDSP_Length __N);`](/documentation/Accelerate/vDSP_zcspecD)

Computes the cross-spectrum of two complex double-precision vectors.


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