No. 2 in A flat major

Whose song is No. 2 in A flat major?

Artist Album
Andras Schiff
Schubert--Impromptus, D899; Moments musicaux, D780
CD 1 : Mitsuko Uchida
Steinway Legends - Grand Edition - 20CDs + 1CD Bonus
Wilhelm Backhaus
Wilhelm Backhaus Sien Letztes Konzert (Disc 1/2)