Piano Sonata No. 15 (Beethoven)

Piano Sonata No. 15 in D major, Op. 28, is a piano sonata by Ludwig van Beethoven. The name Pastoral or Pastorale became known through A. Cranz publishing of Beethoven's work, but was first coined by a London publisher, Broderip & Wilkinson. While not as famous as its immediate predecessor, Piano Sonata No. 14, it is generally admired for its intricate technicality as well as for its beauty. The sonata takes roughly twenty-five minutes to play with its intended repeats.

Published in 1801, the work is dedicated to the Count Joseph von Sonnenfels.

The sonata is in D major, and follows the typical four-movement form of the classical sonata.

The first movement, Allegro, begins in the tonic major with a repetitive and monotone bass line sometimes described as "timpanic." This droning theme continues in various forms throughout the sonata. On top is the simple primary theme of the movement. Eventually, the work introduces a second, more tense melody in F-sharp 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. It then recapitulates back into the themes of the beginning.

The Andante movement is in D minor. The primary feature is the staccato semiquaver bass. There is a slight diversion in the tonic major involving dialogue between a dotted, staccato rhythm and a set of semiquaver triplets. It then returns to the primary melody.

The Scherzo is in D major. Its most important feature is the contrast between four long notes, each an octave apart, and a fast quaver melody. The trio, in B minor, repeats a simple four-bar melody eight times over, with a relentless broken octave/chord bass figuration adding harmonic, rhythmic, and dynamic intensity as the repeats progress. It provides a diversion to the blithe scherzo, contrasting sharply in tone and adding gravity to the prevailing humor.

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