This is a substantial four movement work from the Danish romantic composer Jensen. It is an early work and shows perhaps a little inexperience with musical structure but it is a worthwhile challenge to play it successfully. Although titled as a work in A flat major, F minor is the more predominant key, making the Sonata quite dark in character. A rhythmic Allegro opens the work. A Menuetto Allegro is coupled with a Minore 6/4 and this is followed by a D flat major Andante quasi Adagio which has a sighing type of theme, The last movement is an energetic F minor rondo. An interesting work that deserves a hearing.