Rational tones_at_step (int step, int octave) const;
Rational step_size (int step) const;
int step_count () const;
int normalize_step (int step) const;
Rational tones_at_step (int step, int octave) const;
Rational step_size (int step) const;
int step_count () const;
int normalize_step (int step) const;