The Brahms work that concluded the evening remains the most transcendent — among the great composer’s best. Paul Huang, on the violin, and Juho Pohjonen, assuming duties at their keyboard, were completed by Watkins on the cello. The group began the first movement, Allegro moderato, at a bright tempo, setting an urgent pace for this large-scale work’s breadth of sensations. It’s symphonic in scope, yet structurally dense and rhythmically complex, with varied demands for each musician. Pohjonen transcended the piano part’s octave-heavy thickness, so that the first movement had soaring arcs, and in the sentimental coda, when the opening theme returns in the cello, everything seemed different. We emerge changed.