---
title: "replaceBusses(_:)"
framework: audiotoolbox
role: symbol
role_heading: Instance Method
path: "audiotoolbox/auaudiounitbusarray/replacebusses(_:)"
---

# replaceBusses(_:)

Replaces the current bus array with a copy of the supplied bus array.

## Declaration

```swift
func replaceBusses(_ busArray: [AUAudioUnitBus])
```

## Parameters

- `busArray`: The new bus array.

## Discussion

Discussion The base class issues KVO notifications.