“Beethoven sonatas have been a constant presence in my life,” writes young piano star Jonathan Biss on his website. He continues, “‘Presence’ is too mild a word, though: ‘force’ comes a bit closer to conveying the space he occupies in my heart and head.” Biss has played Beethoven Piano Sonatas for most of his life and in 2011 began recording them. His plan is to record all 32 by 2020. Meanwhile, in 2016, he launches a three-year project to perform them all, beginning in Aspen this summer. He will perform 14 sonatas over three recitals this summer, including the popular “Appassionata” and “Moonlight” sonatas (8/2, 8/16, 8/17).