---
title: kAudioFormatProperty_TagForChannelLayout
framework: audiotoolbox
role: symbol
role_heading: Global Variable
path: audiotoolbox/kaudioformatproperty_tagforchannellayout
---

# kAudioFormatProperty_TagForChannelLayout

An AudioChannelLayoutTag value for a layout.

## Declaration

```swift
var kAudioFormatProperty_TagForChannelLayout: AudioFormatPropertyID { get }
```

## Discussion

Discussion An AudioChannelLayoutTag value for a layout, if there is one. Set the inSpecifier parameter to an AudioChannelLayout structure containing the layout description. This can be used to reduce a layout specified by kAudioChannelLayoutTag_UseChannelDescriptions or kAudioChannelLayoutTag_UseChannelBitmap to a known AudioChannelLayoutTag value.

## See Also

### Constants

- [kAudioFormatProperty_FormatInfo](audiotoolbox/kaudioformatproperty_formatinfo.md)
- [kAudioFormatProperty_FormatName](audiotoolbox/kaudioformatproperty_formatname.md)
- [kAudioFormatProperty_EncodeFormatIDs](audiotoolbox/kaudioformatproperty_encodeformatids.md)
- [kAudioFormatProperty_DecodeFormatIDs](audiotoolbox/kaudioformatproperty_decodeformatids.md)
- [kAudioFormatProperty_FormatList](audiotoolbox/kaudioformatproperty_formatlist.md)
- [kAudioFormatProperty_ASBDFromESDS](audiotoolbox/kaudioformatproperty_asbdfromesds.md)
- [kAudioFormatProperty_ChannelLayoutFromESDS](audiotoolbox/kaudioformatproperty_channellayoutfromesds.md)
- [kAudioFormatProperty_OutputFormatList](audiotoolbox/kaudioformatproperty_outputformatlist.md)
- [kAudioFormatProperty_FirstPlayableFormatFromList](audiotoolbox/kaudioformatproperty_firstplayableformatfromlist.md)
- [kAudioFormatProperty_Encoders](audiotoolbox/kaudioformatproperty_encoders.md)
- [kAudioFormatProperty_Decoders](audiotoolbox/kaudioformatproperty_decoders.md)
- [kAudioFormatProperty_FormatIsVBR](audiotoolbox/kaudioformatproperty_formatisvbr.md)
- [kAudioFormatProperty_FormatIsExternallyFramed](audiotoolbox/kaudioformatproperty_formatisexternallyframed.md)
- [kAudioFormatProperty_AvailableEncodeBitRates](audiotoolbox/kaudioformatproperty_availableencodebitrates.md)
- [kAudioFormatProperty_AvailableEncodeSampleRates](audiotoolbox/kaudioformatproperty_availableencodesamplerates.md)