sbool audioSplit3_debug = true;
static int audioSplit3_threshold = 20;

static L<IntRange> audioSplit3(BWImage img) {
  ret audioSplit3(img, audioSplit3_threshold);
}

static L<IntRange> audioSplit3(BWImage img, int threshold) {
  ret mergeIntRangesCloserThan(threshold, audioSplit2(img));
}