In order to help himself remember the digits of pi, David Macdonald decided to turn each digit into a note on the A minor scale to play on the piano. He claims that now he can hear the melody in his head, which allows him to recall the numbers in order. He included a harmony with his left hand in order to round out the melody a bit. During the video, fun facts about pi are shown in the corner as he plays the song.
Musician Composes Pi Song On Piano