@Test
public void normalizingValuesContainingOnlyZeroesIsANoOp() {

    double[] values2 = Arrays.copyOf(values, values.length);
    
    double gainMultiplier = normalizer.normalize(values, 22050.0f);
    assertThat(gainMultiplier, is(closeTo(1.0d, Math.ulp(0.0d))));
    assertThat(values, is(equalTo(values2)));
}