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# AVAudioNodeBus

The index of a bus on an audio node.

```
typealias AVAudioNodeBus = Int
```

## Discussion

An [`AVAudioNodeBus`](/documentation/AVFAudio/AVAudioNodeBus) represents a bus as a zero-based index. [`AVAudioNode`](/documentation/AVFAudio/AVAudioNode) objects potentially have multiple input and output busses.

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