---
title: AVAudioUnitEQFilterParameters
framework: avfaudio
role: symbol
role_heading: Class
path: avfaudio/avaudiouniteqfilterparameters
---

# AVAudioUnitEQFilterParameters

An object that encapsulates the parameters that the equalizer uses.

## Declaration

```swift
class AVAudioUnitEQFilterParameters
```

## Overview

Overview note: Don’t create an instance of the AVAudioUnitEQFilterParameters class directly. Use the array that returns from the bands property of AVAudioUnitEQ.

## Topics

### Getting and Setting Equalizer Filter Parameters

- [bandwidth](avfaudio/avaudiouniteqfilterparameters/bandwidth.md)
- [bypass](avfaudio/avaudiouniteqfilterparameters/bypass.md)
- [filterType](avfaudio/avaudiouniteqfilterparameters/filtertype.md)
- [frequency](avfaudio/avaudiouniteqfilterparameters/frequency.md)
- [gain](avfaudio/avaudiouniteqfilterparameters/gain.md)

### Constants

- [AVAudioUnitEQFilterType](avfaudio/avaudiouniteqfiltertype.md)

## Relationships

### Inherits From

- [NSObject](objectivec/nsobject-swift.class.md)

### Conforms To

- [CVarArg](swift/cvararg.md)
- [CustomDebugStringConvertible](swift/customdebugstringconvertible.md)
- [CustomStringConvertible](swift/customstringconvertible.md)
- [Equatable](swift/equatable.md)
- [Hashable](swift/hashable.md)
- [NSObjectProtocol](objectivec/nsobjectprotocol.md)
- [Sendable](swift/sendable.md)
- [SendableMetatype](swift/sendablemetatype.md)

## See Also

### Getting and setting the equalizer values

- [bands](avfaudio/avaudiouniteq/bands.md)
- [globalGain](avfaudio/avaudiouniteq/globalgain.md)