The Boss OC-3 Super Octave picks up where the OC-2 left of in terms of accuracy and variety of sub-octave tones. In addition to classic Boss Octaver sounds (1 & 2 octaves down), the OC-3 can be played with all strings in Polyphonic mode. The cutoff adjustment in Poly mode applies the octave effect to lower strings while higher frequencies are free to be played and chorded normally. Plus, the Boss OC-3 Super Octave incorporates an overdrive mode for powerful riffs and layered solos. 

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