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# AudioClassDescription

A structure that describes an audio codec.

```
struct AudioClassDescription
```

## Topics

### Accessing the Data

[`mType`](/documentation/CoreAudioTypes/AudioClassDescription/mType)

A four character code that a manufacturer defines for a codec type.

[`mSubType`](/documentation/CoreAudioTypes/AudioClassDescription/mSubType)

A four character code that a manufacturer defines for a codec subtype.

[`mManufacturer`](/documentation/CoreAudioTypes/AudioClassDescription/mManufacturer)

A four character code that identifies a codec manufacturer.

### Initializers

[`init()`](/documentation/CoreAudioTypes/AudioClassDescription/init())

Creates an empty audio class description.

[`init(mType:mSubType:mManufacturer:)`](/documentation/CoreAudioTypes/AudioClassDescription/init(mType:mSubType:mManufacturer:))

Creates an audio class description for the type, subtype, and manufacturer.


---

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