The string quintet consists of four movements in the usual quick-slow-
scherzo-quick pattern:
I. Allegro ma non troppo In common with other late Schubert works (notably, the
symphony in C major, D. 944, the
piano sonata in B major, D. 960, and the
string quartet in G major, D. 887), the quintet opens with an extremely expansive movement: an Allegro ma non troppo that accounts for more than one third of the total length of the piece (typically, 50 minutes). The movement is notable for its unexpected harmonic turns. The
exposition, lasting 154 bars, begins with an expansive C major chord: as in the G major quartet, D. 887, Schubert here "presents his harmonies—rather than a memorable, well-contoured melody—without a regular rhythmic pulse." is in three-part
ABA (ternary) form. The outer sections, in E major, are of an otherworldly tranquility, while the central section is intensely turbulent and breaks suddenly into the distant key of F minor. When the opening music returns, there is a running 32nd-note passage in the second cello that seems to have been motivated by the turbulence that came before it. In the last three measures of the movement, Schubert ties the entire movement together harmonically with a modulation to the F minor of the middle section and an immediate return to E major. The use of ternary structure to contrast tranquil outer sections with a turbulent central section resembles the second movement of Schubert's
Piano Sonata in A major, D. 959, composed at the same time as the quintet. The juxtaposition of E major and F minor, exceedingly
distantly related keys, establishes the importance of the "tonal relationship of lowered second degree" (or flat
supertonic) "to the tonic", which is exploited in the third and fourth movements. that creates a volume of sound seemingly beyond the capabilities of five-stringed instruments. The first section moves to A major and then back to C major. The middle section moves to E major, then B major, which is VI of III. The C major theme returns at the end. The Trio is in
D major, creating another important flat-supertonic relationship.
IV. Allegretto The last movement is an exuberant
sonata-rondo whose form resembles that of the finale of Mozart's C major quintet. ==Legacy==