> ## Documentation Index
> Fetch the complete documentation index at: https://docs.xbox.com/llms.txt
> Use this file to discover all available pages before exploring further.

# vmulComplex function

> vmulComplex function

Don't use; internal use only.

## Syntax

```cpp theme={null}
void vmulComplex(  
         XMVECTOR& rResult,  
         XMVECTOR& iResult,  
         FXMVECTOR r1,  
         FXMVECTOR i1,  
         FXMVECTOR r2,  
         GXMVECTOR i2  
)  
```

### Parameters

*rResult*   \_Out\_\
Type: XMVECTOR&

Don't use; internal use only.

*iResult*   \_Out\_\
Type: XMVECTOR&

Don't use; internal use only.

*r1*   \_In\_\
Type: FXMVECTOR

Don't use; internal use only.

*i1*   \_In\_\
Type: FXMVECTOR

Don't use; internal use only.

*r2*   \_In\_\
Type: FXMVECTOR

Don't use; internal use only.

*i2*   \_In\_\
Type: GXMVECTOR

Don't use; internal use only.

### Return value

Type: void

Don't use; internal use only.

## Remarks

Don't use; internal use only.

**vmulComplex** is a helper function that is used by the XDSP Fast Fourier Transform (FFT) functions. It is not intended to be used directly by a title.

## Requirements

**Header:** xdsp.h

**Supported platforms:** XBOX One family consoles and XBOX Series consoles

## See also

[xdsp](https://docs.xbox.com/reference/audio/xdsp/xdsp_members.md)

[FFT](https://docs.xbox.com/reference/audio/xdsp/functions/fft.md)

[Game for Windows and the DirectX SDK blog](https://walbourn.github.io/xdsp-h-digital-signal-processing-helper-functions/)


## Related topics

- [XDSP](https://docs.xbox.com/reference/audio/xdsp/xdsp_members.md)
- [vmulComplex](https://docs.xbox.com/reference/audio/xdsp/functions/vmulcomplex_2.md)
- [/batch](https://docs.xbox.com/reference/live/rest/uri/userstats/uri-batch.md)
- [POST (/batch)](https://docs.xbox.com/reference/live/rest/uri/userstats/uri-batchpost.md)
- [Xbox Accessibility Guideline 112](https://docs.xbox.com/build/game-principles/accessibility/xag-deep-dives/xag-112-ui-navigation.md)