Listen to Beethoven: Piano Sonata No. 31 in A-Flat Major, Op. 110: IIIa. Adagio ma non troppo online. Beethoven: Piano Sonata No. 31 in A-Flat Major, Op. 110: IIIa. Adagio ma non troppo is an Unknown language song and is sung by Maurizio Pollini. Beethoven: Piano Sonata No. 31 in A-Flat Major, Op. 110: IIIa. Adagio ma non troppo, from the album Classical Weekend: Beethoven, was released in the year 2021. The duration of the song is 3:11. Download Unknown songs online from JioSaavn.