A very musical compressor and a clean boost. Our Alien Comp pedal has a natural sound and is very musical, just like the high-end rack-mounted compressors found in professional studios. Adjust the compression ratio from moderate to heavy, create a highly effective clean boost, or increase the saturation on your amplifier from subtle to full saturation [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.