Listen to Pure Harmony (Relaxing Piano) online. Pure Harmony (Relaxing Piano) is an Instrumental language song and is sung by Baby Sleep Lullaby Academy. Pure Harmony (Relaxing Piano), from the album Relaxing Jazz Piano Lullabies: Gentle and Sleeping Music for Babies to Relax, Soft Piano Songs for Toddlers to Fall Asleep, was released in the year 2016. The duration of the song is 3:25. Download Instrumental songs online from JioSaavn.