This study demonstrates another compelling example of how the outcome of an electrochemical transformation can be completely altered simply by changing the waveform of current delivery. This time, chemoselective (hetero)arene reduction under rAP is shown to complement the scope of conventional chemical or electrochemical arene reductions. The enhanced reactivity as well as higher chemoselectivity can be explained by a suppression of competing proton reduction by the easily accessible rAP waveform. On preparative scales, no specialized equipment or engineering is required. On larger scales, a simple signal amplifier and signal generator can be employed (see SI). Although further in-depth analysis of mechanism is necessary, the implications of this unique mode of reaction control may hold great promise for other types of chemoselective reductions of import to organic synthesis. Efficient reductive processes in protic media by rAP may also imply an interesting innovation opportunity in the areas of electrochemical CO2 reduction as well as nitrogen fixation, where proton reduction often competes.