Listen to Piano Sonata No. 4 in C Minor, Op. 29: II. Andante assai online. Piano Sonata No. 4 in C Minor, Op. 29: II. Andante assai is an Instrumental language song and is sung by Yakov Zak. Piano Sonata No. 4 in C Minor, Op. 29: II. Andante assai, from the album Russian Performing Art: Yakov Zak, Piano, was released in the year 2010. The duration of the song is 8:26. Download Instrumental songs online from JioSaavn.