Audio Lesson Template 1 2 Now we will learn to play Minor 3rds by ear on your instrument. By itself, a minor 3rd typically has a somewhat sad sound.November 30, 2012 1 2 Now we will learn to play Minor 3rds by ear on your instrument. By itself, a minor 3rd typically has a somewhat sad sound. Minor 3rd – Up Brahms Lullaby Now apply what you have learned.