Product DescriptionWest Coast Harmonica Ace Mark Hummel is back with a truly stellar 16 track blues collection Retroactive featuring not only his own dynamic harp & vocal work, but also the talents of his special guests Charlie Musselwhite, Steve Freund & Rusty Zinn. After hearing Retroactive British blues legend John Mayall raved 'The Spirit of Little Walter Lives On! If you miss the sound of those great early Chess Records, this one's for you. Mark blows Harp like no one else I know, plus plenty of tasty guitar from Rusty Zinn keeps the grooves sizzling'. Retroactive seems destined to become of the years most talked about Blues CD's.