static short[] doubleToShortArray_iround(double[] a, int start, int end) {
  short[] b = new[end-start];
  for (int i = start; i < end; i++)
    b[i-start] = clampToShort(iround(a[i]));
  ret b;
}

static short[] doubleToShortArray_iround(double[] a) {
  ret a == null ?: doubleToShortArray_iround(a, 0, a.length);
}

Began life as a copy of #1026893