---
title: CMAudioCodecType
framework: coremedia
role: symbol
role_heading: Type Alias
path: coremedia/cmaudiocodectype
---

# CMAudioCodecType

An audio codec type.

## Declaration

```swift
typealias CMAudioCodecType = FourCharCode
```

## Discussion

Discussion Certain codec types are also audio formats.

## Topics

### Constants

- [kCMAudioCodecType_AAC_LCProtected](coremedia/kcmaudiocodectype_aac_lcprotected.md)
- [kCMAudioCodecType_AAC_AudibleProtected](coremedia/kcmaudiocodectype_aac_audibleprotected.md)

## See Also

### Data Types

- [CMVideoDimensions](coremedia/cmvideodimensions.md)
- [CMAudioFormatDescriptionMask](coremedia/cmaudioformatdescriptionmask.md)
- [CMMediaType](coremedia/cmmediatype.md)
- [CMVideoCodecType](coremedia/cmvideocodectype.md)
- [CMTextDisplayFlags](coremedia/cmtextdisplayflags.md)
- [CMTextJustificationValue](coremedia/cmtextjustificationvalue.md)
- [Media Type Constants](coremedia/media-type-constants.md)
- [Muxed Stream Types](coremedia/muxed-stream-types.md)
- [Audio Codec Types](coremedia/audio-codec-types.md)