Listen to Smooth Instrumentals online. Smooth Instrumentals is an Unknown language song and is sung by Instrumental Jazz School. Smooth Instrumentals, from the album 50 Simply Chilled Instrumental Jazz (Relaxation Time, Pure Piano Vibes, Basement Jazz Session, Guitar & Saxophone Sounds), was released in the year 2018. The duration of the song is 3:54. Download Unknown songs online from JioSaavn.