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Amazon.com: Donner Octave Guitar Pedal, Harmonic Square Digital Octave Pedal Pitch Shifter 7 Shift Types 3 Tone Modes Sharp Detune Flat True Bypass : Musical Instruments
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AROMA AOS-3 Octpus Polyphonic Octave Electric Guitar Effect Pedal Mini Single Effect with True Bypass - Walmart.com
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