The BOSS MD-500 brings an extensive collection of modulation effects into one versatile pedal, from expressive chorus and sweeping phaser to rotary, tremolo, and rhythmic textures. Advanced Prime algorithms offer detailed sound shaping alongside recreations of classics such as the CE-1 Chorus Ensemble and Roland Dimension D. A graphic LCD and dedicated knobs make essential adjustments accessible, with deeper editing available for building your own sounds.
 
A/B Simul mode lets you combine two patches in series or parallel, while the Insert Loop function positions external drive pedals before, after, or between modulation effects. Assignable onboard switches, tap tempo, and support for external footswitches or an expression pedal provide flexible performance control for stage and studio setups.