Listen to A Lesson in Focus online. A Lesson in Focus is an Instrumental language song and is sung by Blue Moon Swing. A Lesson in Focus, 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 - Study of the Day, was released in the year 2022. The duration of the song is 2:02. Download Instrumental songs online from JioSaavn.