Listen to Piano Sonata No. 31 in A-Flat Major, Op. 110: I. Moderato cantabile molto espressivo online. Piano Sonata No. 31 in A-Flat Major, Op. 110: I. Moderato cantabile molto espressivo is an Instrumental language song and is sung by Grigory Sokolov. Piano Sonata No. 31 in A-Flat Major, Op. 110: I. Moderato cantabile molto espressivo, from the album Grigory Sokolov Plays Bach and Beethoven, was released in the year 1979. The duration of the song is 7:00. Download Instrumental songs online from JioSaavn.