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# kAudioFormatProperty_OutputFormatList

A list of structures describing the audio formats.

```
var kAudioFormatProperty_OutputFormatList: AudioFormatPropertyID { get }
```

## Discussion

A list of <doc://com.apple.documentation/documentation/CoreAudioTypes/AudioFormatListItem> structures describing the audio formats which may be obtained by decoding the format described by the specifier. Set the `inSpecifier` parameter to an [`AudioFormatInfo`](/documentation/AudioToolbox/AudioFormatInfo) structure. At a minimum, the `formatID` field of the `AudioStreamBasicDescription` structure must filled in. Other fields may be filled in. If there is no magic cookie, then the number of channels and sample rate should be filled in.

---

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