---
title: "init(mReferenceDistance:mMaxDistance:mMaxAttenuation:)"
framework: audiotoolbox
role: symbol
role_heading: Initializer
path: "audiotoolbox/mixerdistanceparams/init(mreferencedistance:mmaxdistance:mmaxattenuation:)"
---

# init(mReferenceDistance:mMaxDistance:mMaxAttenuation:)

## Declaration

```swift
init(mReferenceDistance: Float32, mMaxDistance: Float32, mMaxAttenuation: Float32)
```