static ItIt<short[]> audio_rechunk(int windowSize, Iterable<short[]> it) {
  ret iff_endOnNull(new F0<short[]> {
    short[] buf = null;
    int bufPos = 0;
    
    short[] get() {
      if (l(buf)-bufPos >= windowSize)
      if (bufN == windowSize)
      chunks.
      fOr (short[] chunk : chunks) {
      int =
  }
}