Schubert Sonata D.960 Analysis


The interplay of sonata and rondo principles in the fourth movement of Franz Schubert’s last sonata in Bb major, D.960 frames an intriguing backbone structure, which efficaciously serves the finale of the four-movement piece. The refrain material appears as a structural downbeat throughout the piece, supplying unpredictable harmonic shifts to produce a colorful tonal excursion. The opening announcement of an empty octave of G flirts with listener’s expectations because the finale could go anywhere from the G. Sure enough, the first phrase expands in the key of C minor, revealing the dominant function of the G octave. But a PAC in Bb major interrupts C minor at m.10, finally confirming the key suggested by the key signature. As Rosen suggests, Schubert loosens the traditional classical form and stretches its ligaments unmercifully. After occurring in similar fashion preparing for the development section to arrive, the refrain prolongs expectation for the final tonic arrival until the presto coda. Schubert breaks off the main theme phrase from mm.490-512 with three open octave interjections in descending motion from G to Gb to F in order to generate maximum effect for the grand finale.

 

The dominant preparation from Gb to F before the coda calls for attention on the intricate relationship between the first movement and the fourth. First of all, both movements have a 3-key exposition, but land on different key areas. The tonal ambiguity in the first movement is established with a reoccurring trill from Gb to F that functions as a structural downbeat just like the open G in the fourth movement. Movement I foreshadows a structural connection with the last movement. In the first movement, each section within the sonata ends on the trill, which leads to a new key. Furthermore, the Gb-F trill at the end of the first movement foreshadows an intense tonic arrival at the end of the finale so that the dissonance on a large scale resolve. Rhythmic material draws parallel as well. For instance, the dotted rhythm with the continuous left hand sixteenth notes in the second theme of the first movement exposition returns in the exact same way in the third theme of the final movement exposition.

 

Though the fourth movement doesn’t interact with the mysterious Gb as much as the first movement, the attempt for linking the tonic and the dominant is a great example of Schubert’s crossing edge compositional style in his later life. As Taruskin elaborates, the Gb plays not only as the submediant to the tonic, but also as the Neapolitan to the dominant. As one of the most important figures contributing the transitional period between Classical era and Early Romantic era, Schubert broadens his choices for harmonic navigation. In the fourth movement, he not only breaks free from the minor key modulation to the relative major tradition in the exposition, but also adds in interaction of thirds and semitones, finding common ground between the tonic and the dominant. For example, the climax of the fourth movement starts to build up at m. 282 after a Bb chord on a pick up beat. Followed by a stepwise descending motion in the bass from Eb to Cb, the climax finally reaches the Neapolitan key of Bb major. The interaction among Bb, Cb, and F minor, the key before the development, works as a perfect example of harmonic experiment.

 

The romantic introspection expands on melodic vocabulary as well. The 68-measure second theme of the exposition is more harmonically stable with a much slower and peaceful melody. Starting on an F major arpeggiation in the right hand, the sixteenth notes continue uninterrupted throughout the theme, which creates an extremely lyrical flow. However, the ambiguity remains as the semiquaver fashion allows the music to modulate unceasingly. Built on the modulations, the second theme is almost in a ternary form itself. With a visit to D major in the middle, confirmed in m.104, Schubert composes a different melodic pattern for the left hand to enhance the distinction. The later pattern consists of more repeated notes than relationships by thirds from the previous one. Despite the return of the initial melody, the second theme quietly ends on C major, preparing for the third theme of the exposition.

 

Beethoven left a great mark on all subsequent composers, including Schubert. Schubert’s admiration for this singularity in the history of music is evident in his fourth movement. Under Beethoven’s influence, the formalism calling during the Enlightenment age is superseded. Beethoven also leads modal thinking in the minor key. With a 2 bar pause out of no expectation, the third theme opens on a repeated F minor chord in fortissimo with contrasting rhythm of dotted notes. The intense introduction of the minor dominant key reflects Schubert’s experiment with modes over tonalities. The key of the new theme is ambiguous enough to start with, for the lack of appearance of pitch E, which functions as the most crucial key to distinguish between F minor and Ab major.

 

Schubert’s stylistic adventure goes beyond the interplay of harmony and reaches the rhythmic aspect as well. The development section begins after the main theme refrain with juxtaposed triples and quavers with rapid alternation between the two hands. The semiquaver flow reappears at m. 169 in the left hand while the right hand remains in dotted rhythm. Then the left hand accompaniment shifts to triples but keeps the dotted rhythm till m.208. Towards the end of the third theme, brief fragments of the main theme return at m.208 and m. 216 in the right hand along with the new rhythmic pattern in the left hand with diminuendo marking. The new rhythmic pattern generates a clashing effect, making the development sections sound chaotic and angry. The merging of rhythms achieves on a metaphorical level by mixing familiar material from previous themes together. It’s hard not to ponder the emotions Schubert wished to express knowing he had a few months remaining. The mixture of striking chord choices, dynamic shifts, and rhythmic variations reflect chaotic complexity and beauty, which is probably a portion of the inner world of Schubert.