


At one point the clarinet leaps up and down between octave B tones over a shifting harmonic background.

The clarinet's lines are built of a self-perpetuating series of arcs. After a brief fortissimo introduction consisting of angry spurts of figuration in the clarinet punctuated by piano chords, the piano quiets to a murmur. It bears the somewhat paradoxical subtitle "Allegro tristamente": accordingly, the piece is always in motion, but proceeds with a sense of grieving. The structure differs somewhat from the fast-slow-fast pattern of a traditional sonata in that the first movement is itself split into three sections in the pattern fast-slow-fast. Allegro tristamente (Allegretto – Très calme – Tempo allegretto) 2.
