The VS-XO by Visual Sound is a premium dual overdrive with two channels so distinct that they might be separate pedals. The right gives you extremely pronounced mids, a 3-way diode switch, a 3-way bass switch, and even a Clean Mix knob. The left flattens out your mids to resemble a more amp-like sound. This is also the first Visual Sound pedal that has true bypass, but the way it functions is unique to the company and is totally quiet in its switching. Stack the channels in whatever way you want - this pedal was made for experimenters.