A high-shelf boost centered above 4kHz — the same Equalizer engine, pre-set for instant added brightness and clarity.
The Treble Booster brings dull recordings to life: it adds sparkle, definition and “air” to music, and clarity to voices. Unlike a single treble knob it gives separate control over the high shelf, a presence bell around 3.5 kHz and a narrow dip at 7 kHz that keeps sibilance and cymbals from turning piercing.
Everything is live: you hear the change as you adjust, and the response graph shows the exact curve.
A high-shelf filter at your chosen frequency (2–12 kHz) carries the main boost; a peaking filter at 3.5 kHz (Q 0.9) lifts the speech-intelligibility region; and an optional peaking cut at 7 kHz (Q 2.2) tames harshness. An automatic level trim compensates for the added energy, then a true-peak limiter protects against clipping.
Revive muffled voice memos and old tapes.
Add intelligibility to a dark-sounding mic.
Add pick attack and string shimmer.
Brighten a muffled system.
| Shelf | 2–12 kHz, up to +15 dB |
|---|---|
| Presence | 3.5 kHz, 0–8 dB |
| Harshness dip | 7 kHz, 0–8 dB |
Energy above ~10 kHz that adds openness; subtle boosts add a sense of space.
It helps if the highs are present but quiet; if they were never recorded, boosting only adds noise.
Often yes, if the muffled quality is from rolled-off high frequencies — but if it's from room reflections or a bad mic, EQ alone has limits.
Yes — pull it back if 's' and 't' sounds on vocals start sounding sharp or piercing.
This tool runs entirely in your browser using the Web Audio API. Nothing is uploaded, stored or shared — there is no server to send your file to, so it works offline once the page has loaded.
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