// Just a spike (first try). Should use binary search / Newton's method!

sclass AudioFrequencyDetectorSpike1 {

  AudioRecognizer recognizer;

  int vibrations = 24; // how many periods to look at 

  double centerFreq = 440, step = 1;

  int freqs = 25; // how many frequencies to look at

  IF1<Double> f = freq2 -> abs(recognizer.complexSumOfVibrations_raw(recognizer.mainSample, 0, 0, freq2, vibrations))/32768;

  // returns most likely frequency

  double get() {

    new Best<Double> bestFreq;

    for (int iF : countIterator(-freqs/2, freqs/2)) {

      double freq2 = centerFreq+step*iF;

      double value = f.get(freq2);

      //print(freq2 + ": " + value);

      bestFreq.put(freq2, value);

    }

    ret bestFreq!;

  }

  static Scorer scoreMe(int n default 2000) {

    new Scorer scorer;

    repeat n {

      double freq = random(430, 450);

      AudioRecognizer recognizer = new(0.2, new SineSoundSource(freq), 1);

      new AudioFrequencyDetectorSpike1 detector;

      detector.recognizer = recognizer;

      double detected = detector!;

      print("Frequency detected: " + detected + ", was: " + freq);

      scorer.add(distanceToProbability(detected, freq));

    }

    ret scorer;

  }

}