If the level fader is the right hand of any mixing engineer, the equalizer is the left. The 'EQ' is essentially a set of volume controls for specific sections of the full frequency spectrum, so engineers gain control over the level of the bass, treble, or other, more precise slices of the frequency range. Equalizers are just as essential for live sound as they are for recording studios, and are also used to balance the output of any home audio systems. In fact, your phone probably has an equalizer buried somewhere in your audio settings menu.
The EQ: An Audio Essential
If you're mixing audio, then your first job is to strike a rough balance between tracks with your volume faders. A lot of the time, some instruments will want to get in the way of other instruments by invading one another's frequency range. Using an equalizer, you can precisely adjust the frequency response of each instrument to put all the puzzl