---
title: "MLSoundClassifier.ModelParameters.FeatureExtractorType.vggish(revision:)"
framework: createml
role: symbol
role_heading: Case
path: "createml/mlsoundclassifier/modelparameters-swift.struct/featureextractortype/vggish(revision:)"
---

# MLSoundClassifier.ModelParameters.FeatureExtractorType.vggish(revision:)

Represents the VGGish feature extractor, which is compatible with older OS versions.

## Declaration

```swift
case vggish(revision: Int = 1)
```

## Parameters

- `revision`: A version of the VGGish feature extractor.

## Discussion

Discussion The case uses the newest version if you don’t provide an associated value for revision.

## See Also

### Designating a feature extractor

- [MLSoundClassifier.ModelParameters.FeatureExtractorType.audioFeaturePrint(type:revision:)](createml/mlsoundclassifier/modelparameters-swift.struct/featureextractortype/audiofeatureprint(type:revision:).md)
- [MLSoundClassifier.ModelParameters.FeaturePrintType](createml/mlsoundclassifier/modelparameters-swift.struct/featureprinttype.md)