static int similarityToClippedRecordings_h = 20;

// audioFile must already be clipped
static Map<S, Float> similarityToClippedRecordings(File audioFile) {
  BWImage img = audioFileToFrequencyImage(audioFile);
  new Map<S, Float> map;
  img = smoothResizeBWImage_heightOnly(img, similarityToClippedRecordings_h);
  for (File f2 : clippedNamedRecordings()) {
    if (sameFile(audioFile, f2)) continue;
    BWImage img2 = audioFileToFrequencyImage(f2);
    img2 = smoothResizeBWImage_heightOnly(img2, similarityToClippedRecordings_h);
    float sim = bwImageSimilarityResized_ignoreRatioMismatch(img, img2, 0f);
    print(formatDoubleX(sim*100, 2) + "%: " + f2.getName());
    map.put(f2.getName(), sim);
  }
  ret mapSortedByValuesDesc(map);
}

Began life as a copy of #1018640