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It has a wide range of sounds, as knobs have an extremely wide range of values. Setting it with full regen, short delay time and much width will even make it oscillate! I once just unplugged the guitar cord and just played the pedal with a delay for wacky howling noises. That said, it sounds quite good with cleans, from a sublte caress to a "boiling water" bubbly sound, but never harsh. With distorted sounds it doesn't feel right, not adding really much to the sound; not before the distortion pedal, nor after. It comes for really cheap so iit could be worth buying if you like flanger.