BOSS DS-1 features three knobs that can take it in a number of different tonal directions. There's a tone knob, a level knob, and a distortion knob. By cranking each up or down, you can pull out a range of different tones - from subtle bite to rich crunch to all-out fuzz. The midrange on the DS-1 is scooped, which gives it a distinct tonal flavor, which many players prefer. Want sonic reference? Give Nirvana's "Smells Like Teen Spirit" a listen - all that crunch came courtesy of the BOSS DS-1.