Perfect 5ths Playing By Ear – Down 1 2 In this lesson, you will hear a Perfect 5th played downward, then play it by ear on your instrument. Here is an example of a Perfect 5th played down. Perfect 5th - Down January 2, 2013 1 2 In this lesson, you will hear a Perfect 5th played downward, then play it by ear on your instrument. Here is an example of a Perfect 5th played down. Perfect 5th – Down Please press the Exercise button below.