Seymour Duncan Shape Shifter Tap Tremolo Demo. If you like the smooth, easy-to-dial-in sound of vintage amp tremolo, you'll love the Shape Shifter Tap Tremolo. But if you also crave unrestrained versatility and you want to delve into ultra-modern experimental sounds like flutters, shimmers, warbles and even radical “helicopter chops,” the Shape Shifter is also your tremolo.
I have this unit and just really, really like it!