Listen to Smooth Piano online. Smooth Piano is an Unknown language song and is sung by Tranquility Spa Universe. Smooth Piano, from the album Green Nature Spa - Luxury Spa, Elixir of Life, Relaxing Background Music for Spa the Wellness Center, Natural Music for Healing Through Sound and Touch, Tranquility Spa & Total Relax, Sensitive Massage, was released in the year 2015. The duration of the song is 3:57. Download Unknown songs online from JioSaavn.