This demo accompanies the Line 6 Helix interactive Pro Review at http://tinyurl.com/zyoq866, For an explanation of this demo, see post #55 in the Pro Review otherwise this demo will make no sense. Basically, there's an identical 30-second clip playing through each of 41 Helix guitar Amp+Cab presets to test the dynamic response when going from plucking softly compared to plucking hard.