<note> := <note_in_octave><octave> <duration> | <pause> <duration> <note_in_octave> := c | c# | d | d# | e | f | f# | g | g# | a | a# | h <pause> := _ <octave> := V | M | 1 | 2 | 3 <duration> := 1 | 2 | 4 | 8 | 16