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Like all of AboveGround’s pedals, the Tone Control/Booster is a unique design that performs its tone mutation duties in a novel and very effective way. Tone Control/Booster modifies the signal content just outside the fundamental frequencies of the guitar in a soft response curve. This manipulation of adjacent corner frequencies makes it super easy to dial in the amount of harmonics and sub harmonics, greatly expanding the tonal possibilities of any guitar. Tone Control/Booster’s discrete, two-transistor circuit is incredibly amp-like in
