Hilary Hahn is the quirky virtuoso. • Sure, Hahn is one of the world's great violinists, a former child prodigy who made her debut at age 11 with the Baltimore Symphony, signed a major record deal at 16 and has put out 14 albums (including a pair of Grammy winners for concertos of Brahms, Stravinsky, Schoenberg and Sibelius) on the Sony Classical and Deutsche Grammophon labels. She once said she had played some solo Bach every day since she was 8. • On Wednesday, Hahn and pianist Cory Smythe give a recital at the Straz Center, mixing and matching works by Bach, Corelli and Fauré with a series of encores that the violinist commissioned. • But for all her intense concentration in performance, Hahn, now 33, is a free spirit. On Twitter, for instance, she posts in the persona of her violin case (@violincase): "Dispatches from the snitch that is international violinist Hilary Hahn's instrument case. Rants, raves, snippets, tidbits, insider info — the full case study." • "Hilary and I love New Mexico! Sun! Clear air! (Neither of which I can take advantage of, but they look pretty.) Nice breeze! Warmth!" read a recent tweet.