Rarely will a video producer lay down an audio track and leave it. Good, recorded sound is essential in any production, but we can all use a touch-up here and there.
Some people prefer their coffee black, but many of us use at least a little cream and/or sugar to smooth it out a bit. The same is true with video sound. You may have captured a solid recording, but with a little tweaking here and there, it can be awesome. In production jargon, we call this audio sweetening and it's an important part of anything you've seen on the big or small screen. So think of it as cream and sugar, seasoning on food or even Photoshop for sound, but audio sweetening is here to stay.
Audio editors sweeten their tracks using a variety of tools: tone control, dynamics control and time-based effects. Used alone or in combination, these adjustments make sounds bigger, fuller and give them a professional polish.
Tone control is the easiest to start with and the technique most people already understand. Just like the bass and treble controls in your car or the graphic equalizer on your music player, we can control and shape the tonal characteristics of our recorded audio. To do this, we use two different kinds of tone control: equalizers and filters. Equalizers can have anything from two to 31 bands of control and can be as simple as bass and treble knobs or as complicated as a professional graphic equalizer.