Though the sonata was composed in 1851 and only two years after the rest of the works on the program (all were written within weeks of one another in 1849), it is from a different creative period: The composer was knocking out works faster (and perhaps more carelessly) than before, often spending little more than a week on each one, almost as if he knew that, amid encroaching mental illness, his creative days were numbered.
The sonata's third movement is among the composer's most original, with an Italianate melody that's plucked out of the instrument with charmingly rustic effect, in what feels like Schumann's answer to the Act II serenade in Mozart's Don Giovanni. But the final movement shows the composer at his most obsessive, with a five-note motif arriving somewhere about 50 times in less than eight minutes. Much of the rest feels dense to the point of claustrophobia.
Without the brighter sound of the violin, such passages became murkier. Accompanist Robert D. Levin seemed to compensate by bringing a Bachlike sense of definition to the piano part, but the effect felt relentless in stretches where the music so energetically goes nowhere.
Elsewhere, the recital was fairly magical - and attracted a full house at the American Philosophical Society - if only because Kashkashian was so immersed in the music's world that it did not really matter what instrument she was playing. Schumann's songful brand of lyricism emerged as if she was drawing on some secret text as the inspiration for her color and phrasing. And that is important, since all of the 1849 works are considered to be minor, but through Kashkashian's depth of empathy and Levin's sense of what the music needed, seemed as major as can be.
In the Adagio and Allegro, pianist Levin produced some mesmerizing colors I had not previously heard from him. And in the opening of Fünf Stücke, Kashkashian's vibrant viola tone was such a pleasure, the music seemed made for her. So it seemed, too, in the encore, a transcription of the song "Widmung" with its famously soaring melody - that was much needed after going 'round in circles with the sonata. No surprise that in this transcription, the words were not missed. That is the highest compliment to be paid - when a transcription feels thoroughly right and not secondhand. Then again, the skill of the transcription is, in this case, inseparable from the charisma of the performers.
Contact music critic David Patrick Stearns at email@example.com.