Week 6 Project Progress Report #

I started out the week by refactoring the Note class so that new instances are not created every time a new random note is generated. The getter and setter functions are slightly unnecessary for my generative use case, but they could come in handy if I wanted to expand the project later on.

class Note {
  public:
    Note();
    float getRandomNoteFromScale(int scale[], int minOct, int maxOct);
    void setFrequency(float freq, int octave);
    float getFrequency();
 
  private:
    float _frequency;
};

Note::Note() {
  _frequency = 0;
};

float Note::getRandomNoteFromScale(int scale[], int minOct, int maxOct) {
  int scaleIndex = round(random(0, sizeof(scale)));
  float noteFreq = scale[scaleIndex] / 1000.0;
  int octave = random(minOct, maxOct);
  setFrequency(noteFreq, octave);
  return getFrequency();
}

void Note::setFrequency(float freq, int octave) {
  _frequency = freq * pow(2, octave);
}

float Note::getFrequency() {
  return _frequency;
}

Another larger update code-wise was to move the timing calculations to a separate Clock class instead of keeping track of several variables in the main code file. Anything that reduces clutter in the main .ino is welcomed, as the Teensy Audio Library sound generation functionality apparently cannot be abstracted to separate classes.

class Clock {
  public:
    Clock();
    void setInterval(int index, float value);
    void setPrevious(int index);
    void update();
    bool counterOver(int index);

  private:
    float _cTime;
    float _pTimes[8];
    float _intervals[8];
};

Clock::Clock() {
  for (int i = 0; i < 8; i++) {
    _pTimes[i] = _cTime;
    _intervals[i] = 1000.0;
  }
};

void Clock::setInterval(int index, float value) {
  _intervals[index] = value;
};

void Clock::setPrevious(int index) {
  _pTimes[index] = _cTime;
}

void Clock::update() {
  _cTime = millis();
};

bool Clock::counterOver(int index) {
  if (_cTime - _pTimes[index] > _intervals[index]) {
    return true;
  }

  return false;
}

The rest of the week I mostly spent on improving (or “improving”) the generated sounds. I set up control zones which control various parameters of the different instruments.

Activation zones