---
title: mChannelDescriptions
framework: coreaudiotypes
role: symbol
role_heading: Instance Property
path: coreaudiotypes/audiochannellayout/mchanneldescriptions
---

# mChannelDescriptions

A variable length array of mNumberChannelDescription elements that describes a layout. If the mChannelLayoutTag field is set to kAudioChannelLayoutTag_UseChannelDescriptions, use this field to describe the layout.

## Declaration

```swift
var mChannelDescriptions: AudioChannelDescription
```

## See Also

### Accessing the Data

- [mChannelBitmap](coreaudiotypes/audiochannellayout/mchannelbitmap.md)
- [AudioChannelBitmap](coreaudiotypes/audiochannelbitmap.md)
- [mChannelLayoutTag](coreaudiotypes/audiochannellayout/mchannellayouttag.md)
- [AudioChannelLayoutTag](coreaudiotypes/audiochannellayouttag.md)
- [Audio Channel Layout Tags](coreaudiotypes/audio-channel-layout-tags.md)
- [mNumberChannelDescriptions](coreaudiotypes/audiochannellayout/mnumberchanneldescriptions.md)
- [AudioChannelLayoutTag_GetNumberOfChannels(_:)](coreaudiotypes/audiochannellayouttag_getnumberofchannels(_:).md)