---
title: AUChannelInfo
framework: audiotoolbox
role: symbol
role_heading: Structure
path: audiotoolbox/auchannelinfo
---

# AUChannelInfo

The audio input and output channel capabilities for an audio unit.

## Declaration

```swift
struct AUChannelInfo
```

## Topics

### Initializers

- [init()](audiotoolbox/auchannelinfo/init().md)
- [init(inChannels:outChannels:)](audiotoolbox/auchannelinfo/init(inchannels:outchannels:).md)

### Instance Properties

- [inChannels](audiotoolbox/auchannelinfo/inchannels.md)
- [outChannels](audiotoolbox/auchannelinfo/outchannels.md)

## Relationships

### Conforms To

- [BitwiseCopyable](swift/bitwisecopyable.md)
- [Sendable](swift/sendable.md)

## See Also

### Structures

- [AudioUnitConnection](audiotoolbox/audiounitconnection.md)
- [AudioUnitEvent](audiotoolbox/audiounitevent.md)
- [AudioUnitExternalBuffer](audiotoolbox/audiounitexternalbuffer.md)
- [AudioUnitFrequencyResponseBin](audiotoolbox/audiounitfrequencyresponsebin.md)
- [AudioUnitMeterClipping](audiotoolbox/audiounitmeterclipping.md)
- [AudioUnitMIDIControlMapping](audiotoolbox/audiounitmidicontrolmapping.md)
- [AudioUnitOtherPluginDesc](audiotoolbox/audiounitotherplugindesc.md)
- [AudioUnitParameter](audiotoolbox/audiounitparameter.md)
- [AudioUnitParameterEvent](audiotoolbox/audiounitparameterevent.md)
- [AudioUnitParameterHistoryInfo](audiotoolbox/audiounitparameterhistoryinfo.md)
- [AudioUnitParameterNameInfo](audiotoolbox/audiounitparameternameinfo.md)
- [AudioUnitParameterIDName](audiotoolbox/audiounitparameteridname.md)
- [AudioUnitParameterInfo](audiotoolbox/audiounitparameterinfo.md)
- [AudioUnitParameterOptions](audiotoolbox/audiounitparameteroptions.md)
- [AudioUnitParameterStringFromValue](audiotoolbox/audiounitparameterstringfromvalue.md)