Piano Sonata No. 15 (Beethoven)

Eventually, the work introduces a second, more tense melody in F♯ minor, which builds up into a passage of constant quavers.

The development of the movement runs through various minor keys, ever becoming more dramatic and angst-filled as it compresses the main theme into a repeated one-bar rhythm, which gradually fades away.

There is a slight diversion in the tonic major involving dialogue between a dotted, staccato rhythm and a set of semiquaver triplets.

It provides a diversion to the blithe scherzo, contrasting sharply in tone and adding gravity to the prevailing humor.

Out of not only his piano sonatas but all of his published works up to this point, this is the first time that Beethoven decides to write ma non troppo.

[citation needed] Beethoven employs various amusing, interesting and very adventurous episodes, all with different moods, rhythms, and harmonic texture.