Bluegrass ensemble led by Tyminski, the guitarist and mandolinist in Alison Krauss’s Union Station most widely known as the singing voice of George Clooney in O Brother, Where Art Thou? In recent years, Tyminski’s live shows with his band have become bluegrass fan favorites. “See the Dan Tyminski Band if they’re playing anywhere within a hundred miles of you,” writes Americana Highways.” $51.