}
for (i, (cquad, scquad)) in coeffs[start..SAMPLES/2].chunks_exact_mut(4).zip(scales[start..].chunks_exact(4)).enumerate() {
zero_part = start + i * 4 + 4;
}
for (i, (cquad, scquad)) in coeffs[start..SAMPLES/2].chunks_exact_mut(4).zip(scales[start..].chunks_exact(4)).enumerate() {
zero_part = start + i * 4 + 4;