static Map<S, Float> similarityToClippedRecordings(File audioFile) {
  File f = recordingsDir(name);
  BWImage img = audioFileToFrequencyImage(clip);
  new TreeMap<S, Float> map;
  for (File f2 : listFilesWithExtension(recordingsDir("clipped"), "wav")) {
    BWImage img2 = audioFileToFrequencyImage(f2);
    float sim = bwImageSimilarityResized(img, img2);
    map.put(f2.getName(), sim);
  }
  ret map;
}