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  "title" : "Audio Format Description Mask Codes"
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# Audio Format Description Mask Codes

Mask codes that identify audio formats.

## Topics

### Constants

[`var kCMAudioFormatDescriptionMask_All: CMAudioFormatDescriptionMask`](/documentation/CoreMedia/kCMAudioFormatDescriptionMask_All)

A mask that represents all parts of an audio format description.

[`var kCMAudioFormatDescriptionMask_ChannelLayout: CMAudioFormatDescriptionMask`](/documentation/CoreMedia/kCMAudioFormatDescriptionMask_ChannelLayout)

A mask that represents the audio channel layout.

[`var kCMAudioFormatDescriptionMask_Extensions: CMAudioFormatDescriptionMask`](/documentation/CoreMedia/kCMAudioFormatDescriptionMask_Extensions)

A mask that represents the format description extensions.

[`var kCMAudioFormatDescriptionMask_MagicCookie: CMAudioFormatDescriptionMask`](/documentation/CoreMedia/kCMAudioFormatDescriptionMask_MagicCookie)

A mask that represents the magic cookie.

[`var kCMAudioFormatDescriptionMask_StreamBasicDescription: CMAudioFormatDescriptionMask`](/documentation/CoreMedia/kCMAudioFormatDescriptionMask_StreamBasicDescription)

A mask that represents the audio stream description.


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