https://playguitarnotes.com/pedals/boss-cs-3-compressor-sustainer-guitar-pedal-review/ Another gem from Boss, the CS-3 compressor, and sustainer combo pedal takes signals that are overly loud and compresses them into a more palatable volume level, while also managing to keep lower signals within a desired threshold. Certain styles of music sound best with a bit of compression on them to thicken and even out the sound. If you find yourself playing a lot of progressive music or rock and metal that switches between clean and distorted tones, you’re likely going to run into the problem of certain sections of your songs seeming too loud compared to others. This pedal nips that problem right in the bud.