George, since I'm sure you had a chance to watch AJ demo the SD5's 'riff' feature too, perhaps you can provide a better and more detailed explanation of how this feature works than I can. Is the SD5's riff feature similar (or a lot different) than the Yamaha feature and/or Roland's feature mentioned by Booby & Fran. - Scott

PS: realizing we were both at NAMM on Friday morning, sorry we missed each other again there.