# Interface: SynthPatchEQFilter

## Highcharts. SynthPatchEQFilter

An EQ filter definition for a bell filter.

### Requires

- module:modules/sonification

### Members

#### Q :number|undefined

  Filter Q. Defaults to 1. Lower numbers mean a wider bell.

  ##### Type:

  - number | undefined

#### frequency :number|undefined

  Filter frequency.

  ##### Type:

  - number | undefined

#### gain :number|undefined

  Filter gain. Defaults to 0.

  ##### Type:

  - number | undefined