---
title: busType
framework: audiotoolbox
role: symbol
role_heading: Instance Property
path: audiotoolbox/auaudiounitbusarray/bustype
---

# busType

Determines whether the bus array is for input or output.

## Declaration

```swift
var busType: AUAudioUnitBusType { get }
```

## See Also

### Bus Array Methods and Properties

- [count](audiotoolbox/auaudiounitbusarray/count.md)
- [isCountChangeable](audiotoolbox/auaudiounitbusarray/iscountchangeable.md)
- [ownerAudioUnit](audiotoolbox/auaudiounitbusarray/owneraudiounit.md)
- [subscript(_:)](audiotoolbox/auaudiounitbusarray/subscript(_:).md)
- [setBusCount(_:)](audiotoolbox/auaudiounitbusarray/setbuscount(_:).md)
- [addObserver(toAllBusses:forKeyPath:options:context:)](audiotoolbox/auaudiounitbusarray/addobserver(toallbusses:forkeypath:options:context:).md)
- [removeObserver(fromAllBusses:forKeyPath:context:)](audiotoolbox/auaudiounitbusarray/removeobserver(fromallbusses:forkeypath:context:).md)