If you consider yourself a staunch traditionalist, play only the blues or neoclassical shred, and think The Edge’s playing sounds weird, turn the page now. On the other hand, if Radiohead, Sonic Youth and David Torn are on your iPod’s playlist, read on. The Electro-Harmonix Superego is a category-defying effect pedal that falls into a foggy region between reverb, sustainer and synth engine and generates some of the most mysterious and ethereal textures ever to emanate from a guitar. Offering simple but powerful controls and an effect loop, the Superego delivers a seemingly endless variety of textures, keyboard-like tones and soundscapes that will inspire adventurous players for a lifetime.