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Why every instrument lives in a frequency neighbourhood
Sound is vibration, and frequency counts how many vibrations happen per second, in hertz. Human hearing spans roughly twenty hertz to twenty thousand hertz, but no single instrument uses all of it. A kick drum lives mainly below one hundred and fifty hertz. A vocal lives mainly between eighty hertz and twelve thousand hertz, with its intelligibility concentrated in the middle. Cymbals live above five thousand hertz. An equaliser, or EQ, lets you raise or lower specific frequency ranges, and the first skill of EQ is knowing where to look: if a mix sounds muddy, the problem is usually in the low mids around two hundred to five hundred hertz, not in the extreme highs. This chart maps ten common instruments onto the frequency spectrum, so you can see their neighbourhoods at a glance.
The chart uses a logarithmic frequency axis, because hearing is logarithmic: the distance from twenty to two hundred hertz feels as large as the distance from two thousand to twenty thousand, even though the second gap is far wider in raw numbers. On a linear axis, everything below one thousand hertz would be squeezed into a corner and the chart would be useless. On the logarithmic axis used here, each octave takes the same visual space, which matches how musicians think in octaves and how engineers hear frequency. The chart also includes a frequency-to-note converter, because EQ decisions often start from a note: if a guitar string rings at eighty-two hertz, that is an E, and its harmonics appear at multiples of that frequency, which is why a problem at one frequency often has echoes higher up.
How to use the chart
- Choose an instrument to highlight its frequency zone in red.
- Compare its zone with the other instruments to see where they overlap and where they are separate.
- Enter any frequency in hertz to find its nearest musical note and how far off it is in cents.
- Use the band guide below the chart to name what you hear: sub-bass, bass, low mids, mids, presence or air.
A worked example
Take a mix where the vocal and the guitar fight each other. The chart shows the vocal zone from eighty to twelve thousand hertz and the guitar zone from eighty to six thousand hertz: they overlap almost completely in the mids, which is why they clash. The fix is rarely to turn one up and the other down. Instead, find the frequency where each one matters most: the guitar body around two to three hundred hertz, the vocal presence around three to five thousand hertz. A gentle cut to the guitar in the presence range, where the vocal needs clarity, often separates them better than any volume change. Now check the frequency converter: four hundred and forty hertz is A above middle C, the standard tuning reference, and eight hundred and eighty is the A an octave higher. Those anchors help you translate between notes on a score and frequencies on an EQ display.
Cut first, boost second
Experienced engineers usually cut before they boost, for a simple reason: boosting adds energy and can quickly push a mix toward clipping, while cutting removes what is in the way and leaves room for everything else. If a kick drum lacks punch, the problem may be too much low-mid mud around three hundred hertz, not too little bass at sixty hertz, and a cut at three hundred may reveal the punch that was already there. If a vocal sounds dull, a small boost in the presence range may help, but first check whether another instrument is masking that range. Boosts wider than a few decibels, or cuts narrower than a musical need, usually signal that the recording itself, the microphone choice, or the arrangement needs attention, not the EQ. EQ polishes a good recording; it cannot rescue a fundamentally wrong sound.
What the zones do not mean
These zones are starting points, not rules. A bass guitar played high on the neck reaches frequencies a chart might assign to a guitar. A piano spans almost the whole spectrum, from twenty-seven hertz to over twelve thousand. A synthesiser can sit anywhere its designer chooses. Room acoustics, microphone placement and playing style shift every zone, sometimes by a large amount. Use the chart to aim your first EQ move, then listen: sweep a gentle boost slowly across the range and notice where the sound you want, or the problem you hate, gets strongest. That listening test, not the chart, makes the final decision. The chart saves you from searching the whole spectrum blindly; your ears finish the job. Keep that order, and EQ becomes a fast, confident tool instead of a long guessing game.