Audio Glossary
Tone · aka EQ, equalizer
WHAT IS
EQUALIZATION (EQ)?
Equalization (EQ) adjusts the balance of frequencies in a signal — boosting or cutting specific ranges like the lows, mids, or highs. It's the primary tool for shaping tone: removing mud, adding air, carving space so instruments don't clash, and making a mix sound clear and balanced across the frequency spectrum.
The two jobs of EQ
Corrective EQ fixes problems — cutting a boxy buildup around 300–500Hz, removing sub rumble below 30Hz, taming harsh highs. Creative EQ shapes character — adding air up top for sheen, boosting low-mids for warmth, carving a pocket so the kick and bass each have room.
The most useful EQ move in mixing is subtractive: cutting the frequencies that clash rather than boosting to compete. When every track fights for the same range, the mix turns to mud. Carve first, boost second, and always in service of the whole mix — not one soloed track.
Quick answers
EQUALIZATION (EQ) FAQ.
What is EQ used for?
Shaping tone by boosting or cutting specific frequency ranges — removing mud, adding clarity or air, and carving space so instruments don't clash. It's the primary tone-shaping tool in both mixing and mastering.
Should I boost or cut with EQ?
Lead with cuts. Subtractive EQ — removing the frequencies that clash — keeps a mix clean, where boosting to compete usually creates mud. Boost sparingly and for character, cut to solve problems.
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