Very musical compressor and a clean boost. Our Alien Comp pedal is natural-sounding and very musical, just like the high-end rack-mounted compressors found in professional studios. Adjust your compression ratio settings from moderate to strong, create a very effective clean boost, or turn your amp from subtle overdrive to full overdrive [with just a few turns of the controls]. Using the same compressor circuit as our Joe Walsh Double Classic pedal, this pedal is acclaimed by musicians around the world.