---
title: volume
framework: avfaudio
role: symbol
role_heading: Instance Property
path: avfaudio/avaudiomixing/volume
---

# volume

The bus’s input volume.

## Declaration

```swift
var volume: Float { get set }
```

## Discussion

Discussion The default value is 1.0, and the range of valid values is 0.0 to 1.0. Only the AVAudioEnvironmentNode and the AVAudioMixerNode implement this property.