Another final step in polishing a track is the automation effects. Automation is an easy way to use your mouse and draw in the different effects of the sound. With drawing the automation, you can control the track volume, it's sin or cosine waves, and it's sound distortion. This creates depth and special effects for the music track. Think of movies and their special effects. Same thing with music and it's special effects. It is very convenient because all you need to do is use your mouse to draw the effects of the track.