The Boxer Voice Changer ($20) proved to be the pick of the litter; we paired it with every noisemaker we bought, transforming even the most mundane groove into a buzzing, ticking, rhythmic paradise. The Voice Changer's three settings - Normal (filter), Robot (vocoder), and Kid (pitch shifter) - kept us entertained for hours. Whether we processed rhythms, notes, or feedback, the results were always musically satisfying.