Listen to Nighttime Sleep Harmonies online. Nighttime Sleep Harmonies is an Instrumental language song and is sung by Royalty Free Music Guitar Melodies, The Singing Guitar and The Jazz Piano Brazilian Guitar Smooth Sax Quartet.. Nighttime Sleep Harmonies, from the album Guitar Music Dreams for Peaceful Sleep, was released in the year 2025. The duration of the song is 2:47. Download Instrumental songs online from JioSaavn.