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Guides & Articles

Practical, plain-language writing on audio equalization — how it works, how to use it on vocals, the mistakes worth avoiding, and the hearing science behind it.

Quick Frequency Reference

A rough map of the audible spectrum and what tends to live in each region. Treat these as starting points, not strict rules — your ears and your source material are the final judge.

Sub-bass
20–60Hz
Felt more than heard; rumble, sub-bass weight
Bass
60–250Hz
Kick drums, bass instruments, warmth — excess sounds boomy
Low-mids
250Hz–2kHz
Body and fullness; excess sounds boxy or congested
High-mids
2–6kHz
Clarity, presence, intelligibility; excess sounds harsh
Treble
6–12kHz
Sparkle, detail, sibilance
Air
12–20kHz
Openness and polish; subtle by nature

Try It Yourself

Reading about EQ only goes so far — the fastest way to build a feel for it is to hear the changes in real time. Open QuadEqualizer and try boosting or cutting each of the four bands on a track you know well.