Listen to Four Preludes, Op. 5: Moderato quasi andante. Molto tranquillo online. Four Preludes, Op. 5: Moderato quasi andante. Molto tranquillo is an English language song and is sung by Artur Pizarro. Four Preludes, Op. 5: Moderato quasi andante. Molto tranquillo, from the album 100 Relaxing Classics for Concentration, was released in the year 2014. The duration of the song is 2:33. Download English songs online from JioSaavn.