---
title: kAudioFormatProperty_OutputFormatList
framework: audiotoolbox
role: symbol
role_heading: Global Variable
path: audiotoolbox/kaudioformatproperty_outputformatlist
---

# kAudioFormatProperty_OutputFormatList

A list of structures describing the audio formats.

## Declaration

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

## Discussion

Discussion A list of 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 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.

## 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_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)
- [kAudioFormatProperty_AvailableEncodeChannelLayoutTags](audiotoolbox/kaudioformatproperty_availableencodechannellayouttags.md)