static Pair<L<IntRange>, File> autoClipRecording(S name) {
  File f = recordingsDir(name);
  Clip clip = spectro_clipFromFile(f);
  BWImage img = clipToFrequencyImage(clip);
  L<IntRange> parts = audioSplit3(img);
  File clipFile = recordingsDir("clipped/" + f.getName());
  File imgFile = replaceExtension(clipFile, ".png");
  if (empty(parts))
    ret with deleteFiles(clipFile, imgFile);
  spectro_intRangesToWAV(clip, parts, clipFile);
  savePNG(imgFile,
    mergeBWImagesHorizontally(horizontalIntRangesToImages(img, parts), spaceColor := 0));
  ret pair(parts, clipFile);
}