---
title: AVAudioUnitDelay
framework: avfaudio
role: symbol
role_heading: Class
path: avfaudio/avaudiounitdelay
---

# AVAudioUnitDelay

An object that implements a delay effect.

## Declaration

```swift
class AVAudioUnitDelay
```

## Overview

Overview A delay unit delays the input signal by the specified time interval and then blends it with the input signal. You can also control the amount of high-frequency roll-off to simulate the effect of a tape delay.

## Topics

### Getting and setting the delay values

- [delayTime](avfaudio/avaudiounitdelay/delaytime.md)
- [feedback](avfaudio/avaudiounitdelay/feedback.md)
- [lowPassCutoff](avfaudio/avaudiounitdelay/lowpasscutoff.md)
- [wetDryMix](avfaudio/avaudiounitdelay/wetdrymix.md)

## Relationships

### Inherits From

- [AVAudioUnitEffect](avfaudio/avaudiouniteffect.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

### Audio effects

- [AVAudioUnitEffect](avfaudio/avaudiouniteffect.md)
- [AVAudioUnitEQ](avfaudio/avaudiouniteq.md)
- [AVAudioUnitDistortion](avfaudio/avaudiounitdistortion.md)
- [AVAudioUnitReverb](avfaudio/avaudiounitreverb.md)