@Deprecated
    private void registerPitchAccentCollectionFeatureExtractors() throws FeatureExtractorException {
        try {
            String pad_filename = getParameter("spectral_pitch_accent_detector_collection");
            PitchAccentDetectionClassifierCollection pacc;

            /**
             * TODO: this shouldn't happen here.  This ensemble classifier should be an AuToBI classifier that is
             * loaded from a special case pitch accent detection AuToBITask
             */
            // Load PitchAccentDetectionClassifierCollection
            FileInputStream fis;
            ObjectInputStream in;
            fis = new FileInputStream(pad_filename);
            in = new ObjectInputStream(fis);
            Object o = in.readObject();
            if (o instanceof PitchAccentDetectionClassifierCollection) {
                pacc = (PitchAccentDetectionClassifierCollection) o;
            } else {
                throw new FeatureExtractorException(
                        "Object read from -spectral_pitch_accent_detector_collection=" + pad_filename
                        + " is not a valid PitchAccentDetectionClassifierCollection");
            }

            // Register appropriate feature extractors for each classifier in the collection
            Integer high_bark = Integer.parseInt(getOptionalParameter("high_bark", "20"));
            for (int low = 0; low < high_bark; ++low) {
                for (int high = low + 1; high <= high_bark; ++high) {
                    registerFeatureExtractor(
                            new SpectrumPADFeatureExtractor(low, high, pacc.getPitchAccentDetector(low, high),
                            new SpectrumPADFeatureSet(low, high)));
                    registerFeatureExtractor(
                            new CorrectionSpectrumPADFeatureExtractor(low, high, pacc.getCorrectionClassifier(low, high),
                            new CorrectionSpectrumPADFeatureSet(low, high)));
                }
            }
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } catch (AuToBIException e) {
            e.printStackTrace();
        }
    }