operator + method

Pitch operator +(
  1. Interval interval
)

Implementation

Pitch operator +(Interval interval) {
  var diatonicIndex = letterIndex + interval.number - 1;
  final octave = this.octave + diatonicIndex ~/ 7;
  diatonicIndex %= 7;
  final semitones = [0, 2, 4, 5, 7, 9, 11][diatonicIndex] + 12 * octave;
  final accidentals = midiNumber + interval.semitones - semitones;
  return new Pitch(
      chromaticIndex: semitones, accidentalSemitones: accidentals);
}