---
title: featureExtractor
framework: createml
role: symbol
role_heading: Instance Property
path: createml/mlsoundclassifier/featureextractionparameters/featureextractor
---

# featureExtractor

The algorithm type the session uses to extract features from audio files.

## Declaration

```swift
var featureExtractor: MLSoundClassifier.ModelParameters.FeatureExtractorType
```

## See Also

### Accessing feature extraction parameters

- [overlapFactor](createml/mlsoundclassifier/featureextractionparameters/overlapfactor.md)
- [featureExtractionTimeWindowSize](createml/mlsoundclassifier/featureextractionparameters/featureextractiontimewindowsize.md)