static File clipWAVFromMarkers(File srcWAV, L<? extends Number> markers, File destWAV) {
  Clip clip = spectro_clipFromFile(f);
  L<IntRange> parts = intsToIntRanges(sorted(allToInt(markers)));
  if (empty(parts))
    deleteFile(destWAV);
  else
    spectro_intRangesToWAV(clip, parts, destWAV);
  ret destWAV;
}