static L<IntRange> audio_streaksUsingBand_v1(BWImage img, IntRange band, O... _) {
  BWImage bandImage = clipBWImage(img, 0, band.start, img.getWidth(), band.end);
  BWImage img2 = bwAutoContrast(squishTo1Pixel(bandImage));
  optOutParam(_, processedImage := img2);
  float threshold = optParam(_, 'threshold, 0.5f);
  L<IntRange> streaks = findBrightHorizontalStreaks(img2, threshold);
  streaks = joinIntRangesWithDistanceLessThan(streaks, 10);
  if (boolOptParam(_, 'printStreaks)) printStruct(+streaks);
  ret streaks;
}