The 2013 Truefire Corey Congilio's 50 Blues Rhythms You Must Know Learning Data-DVD is an instructional video software specifically designed for guitar players interested in learning blues rhythms. Published by Truefire and authored by Corey Congilio, this DVD features a variety of controls, materials, and tools to help beginners and intermediate players master the essential blues rhythms. With a focus on music and the blues subject area, this DVD provides valuable learning content for those looking to improve their guitar skills in the blues genre.