Listen to Relaxing Harmony online. Relaxing Harmony is an Instrumental language song and is sung by Pet Music Therapy and RelaxMyCat. Relaxing Harmony, from the album Feline Music Therapy: Lullaby-Like Melodies for Cats and Kittens, was released in the year 2019. The duration of the song is 3:01. Download Instrumental songs online from JioSaavn.