Listen to Mellow Carnival online. Mellow Carnival is an Unknown language song and is sung by Instrumental Jazz School. Mellow Carnival, from the album Swing Jazz Coffee Party (Mellow Carnival, Moody Rhythm, Blue Vibes, Shades of Smooth Retro), was released in the year 2018. The duration of the song is 3:48. Download Unknown songs online from JioSaavn.