Listen to Sleep Music online. Sleep Music is an Instrumental language song and is sung by The Hang Drum Project, Hang Drum Music and Spa. Sleep Music, from the album Hang Drum Relaxation Music For Spa, Massage, Sleep, Yoga, Meditation and Spa Music, was released in the year 2018. The duration of the song is 2:24. Download Instrumental songs online from JioSaavn.