EQ basics: cutting vs boosting, the six filter shapes, and the frequency problems you will actually meet
Equalisation (EQ) turns frequency ranges up or down. This guide explains subtractive and additive EQ, the six filter shapes most plug-ins share, and where the usual problems (rumble, mud, boxiness, harshness) tend to sit, with the caveat that every range is a starting point for your ears, not a rule.
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