---
title: mChannelBitmap
framework: coreaudiotypes
role: symbol
role_heading: Instance Property
path: coreaudiotypes/audiochannellayout/mchannelbitmap
---

# mChannelBitmap

If mChannelLayoutTag is set to kAudioChannelLayoutTag_UseChannelBitmap, this field is the channel-use bitmap.

## Declaration

```swift
var mChannelBitmap: AudioChannelBitmap
```

## See Also

### Accessing the Data

- [AudioChannelBitmap](coreaudiotypes/audiochannelbitmap.md)
- [mChannelDescriptions](coreaudiotypes/audiochannellayout/mchanneldescriptions.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)