For a musician, hearing is everything. If Beethoven was alive now, he could attest to that. It's tempting to speculate whether modern medicine could have helped Beethoven overcome his deafness. Doctors were unable to help Austrian pianist Till Fellner, who suffered a temporary hearing problem in 2005. The malady, a bad case of tinnitus, got better on its own. On today's show, Fellner plays one of Beethoven's piano sonatas in Washington, D.C.