---
title: mGainScale
framework: audiotoolbox
role: symbol
role_heading: Instance Property
path: audiotoolbox/audiopanninginfo/mgainscale
---

# mGainScale

A multiplier for audio panning values, typically representing a volume value in the range from 0 to 1. A value of 1 results in audio panning at unity gain. A value of 0 silences all channels.

## Declaration

```swift
var mGainScale: Float32
```