Dynamics play an important role in music. They help to convey emotion, whether it’s a sultry blues solo or the unrelenting gallop of unfettered metal. But uncontrolled dynamics can take all your best intentions and turn them into so much, well…mush. That’s where compression comes in, softening loud sounds and boosting low signal levels to keep everything more uniform. So, a compressor’s main job is to make every note the same volume.