Listen to Smooth Harmonic Release online. Smooth Harmonic Release is an Instrumental language song and is sung by Guitar Relax, Relaxing ASMR and Soothing Relaxing Music. Smooth Harmonic Release, from the album Guitar Music for Relaxation: Soft and Serene Tones, was released in the year 2025. The duration of the song is 2:54. Download Instrumental songs online from JioSaavn.