Minor 3rds Dictation Chord 1 2 In this lesson, you will hear Minor 3rds played as harmonic intervals (chords) and you will write them in music notation. Minor 3rd - Chord November 26, 2012 1 2 In this lesson, you will hear Minor 3rds played as harmonic intervals (chords) and you will write them in music notation. Minor 3rd – Chord Please press the Exercise button below.