The International Bluegrass Museum in downtown Owensboro presents the Revolution of the American Guitar Friday night at 7 p.m. at the Museum. And, it's FREE! Acoustic guitar aficionados are in for a treat during a presentation that will showcase one of America’s favorite instruments. It will feature musical vignettes by virtuoso guitarists Richard Starkey and Craig Thatcher. The presentation will be given by Dick Boak, archivist for Martin Guitar. who will offer an interactive history of the 180-year-old guitar company, as well as showcase several important examples in the evolution of Martin acoustic guitars. The presentation will focus on Martin’s colorful history, the development of the modern acoustic guitar, Martin's historical contributions to the definitive acoustic guitar design, artist signature model collaborations, and on specific guitar shapes, sizes and tonewoods that lend themselves to particular musical genres.