static double[] normalizedAutocorrelationTableForAudioSamples(short[] samples) {
  ret normalizedAutocorrelationTableForAudioSamples(samples, 0, l(samples));
}

static double[] normalizedAutocorrelationTableForAudioSamples(short[] samples, int start, int end) {
  double[] table = autocorrelationTableForAudioSamples(samples, start, end);
  double factor = autocorrelationNormalizationFactorForAudioSamples(samples, start, end);
  for i over table:
    table[i] = doubleRatio(table[i], factor);
  ret table;
}

static double[] normalizedAutocorrelationTableForAudioSamples(short[] samples, IntRange r) {
  ret normalizedAutocorrelationTableForAudioSamples(samples, r.start, r.end);
}