---
title: "init(audioUnit:busType:)"
framework: audiotoolbox
role: symbol
role_heading: Initializer
path: "audiotoolbox/auaudiounitbusarray/init(audiounit:bustype:)"
---

# init(audioUnit:busType:)

Initializes an empty bus array.

## Declaration

```swift
convenience init(audioUnit owner: AUAudioUnit, busType: AUAudioUnitBusType)
```

## Parameters

- `owner`: The audio unit that owns the bus array.
- `busType`: Determines whether the bus array is for input or output.

## Return Value

Return Value A newly-initialized bus array.

## See Also

### Initialization

- [init(audioUnit:busType:busses:)](audiotoolbox/auaudiounitbusarray/init(audiounit:bustype:busses:).md)