Listen to Mellow Guitar Harmony online. Mellow Guitar Harmony is an Instrumental language song and is sung by The Jazz Piano Brazilian Guitar Smooth Sax Quartet., Deep Meditation Spa and Sound Bank of Nature. Mellow Guitar Harmony, from the album Relaxing Guitar: Music for Spa and Massage, was released in the year 2025. The duration of the song is 2:47. Download Instrumental songs online from JioSaavn.