Listen to A Lesson on the Keys online. A Lesson on the Keys is an Instrumental language song and is sung by Blue Moon Swing. A Lesson on the Keys, from the album ワークスペースに最適なサクサクはかどるジャズBGM - The Melody of My Laptop, was released in the year 2022. The duration of the song is 1:18. Download Instrumental songs online from JioSaavn.