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# SHAPE_EQCOMP_FILTER_INDEX

> SHAPE_EQCOMP_FILTER_INDEX

# SHAPE\_EQCOMP\_FILTER\_INDEX

Equalizer filters.

## Syntax

```cpp theme={null}
enum SHAPE_EQCOMP_FILTER_INDEX    
{  
    SHAPE_EQCOMP_FILTER_INDEX_A,  
    SHAPE_EQCOMP_FILTER_INDEX_B,  
    SHAPE_EQCOMP_FILTER_INDEX_C  
}  
```

## Constants

| Constant                        | Description              |
| ------------------------------- | ------------------------ |
| SHAPE\_EQCOMP\_FILTER\_INDEX\_A | First (A) biquad filter  |
| SHAPE\_EQCOMP\_FILTER\_INDEX\_B | Second (B) biquad filter |
| SHAPE\_EQCOMP\_FILTER\_INDEX\_C | Third (C) biquad filter  |

## Remarks

The equalizer is implemented as three serial biquad filters, designated as A, B, and C. The coefficients are stored in a [SHAPE\_EQCOMP\_CONTEXT](/reference/audio/shapeeqcompcontext/structs/shape_eqcomp_context) structure.

For more information, see [Equalization and compression](/build/console-features/audio/overviews/shape-overview#ID4ECF) in [Overview of SHAPE](/build/console-features/audio/overviews/shape-overview).

## Requirements

**Header:** shapeeqcompcontext.h

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

## See also

[ShapeEqCompContext](/reference/audio/shapeeqcompcontext/shapeeqcompcontext_members)


## Related topics

- [SetShapeEqCompFilterCoefficients](/reference/audio/shapeeqcompcontext/functions/setshapeeqcompfiltercoefficients.md)
- [GetShapeEqCompFilterCoefficients](/reference/audio/shapeeqcompcontext/functions/getshapeeqcompfiltercoefficients.md)
- [SetShapeEqCompFilterTargetCoefficients](/reference/audio/shapeeqcompcontext/functions/setshapeeqcompfiltertargetcoefficients.md)
- [GetShapeEqCompFilterTargetCoefficients](/reference/audio/shapeeqcompcontext/functions/getshapeeqcompfiltertargetcoefficients.md)
- [SetShapeEqCompRawFilterCoefficients](/reference/audio/shapeeqcompcontext/functions/setshapeeqcomprawfiltercoefficients.md)