// effects · tool 12
Equalizer
10-band EQ with live preview, one-click presets and a real frequency-response curve. Also your bass booster.
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A real 10-band equalizer, in your browser
Each slider drives a Web Audio BiquadFilter — a low shelf at 31 Hz, a high shelf at 16 kHz, and peaking filters in between, ±12 dB each. The curve above the sliders is the actual combined frequency response of the filter chain (computed with getFrequencyResponse), not a decoration. Adjust while the track plays and hear changes instantly; the export renders the identical chain offline, so what you hear is what you download.
Bass booster online
Looking to boost bass specifically? The Bass Boost preset raises the 31–125 Hz region in one click. Bass boosting consumes headroom — if the result distorts, drop the low sliders a couple of dB or run the file through our normalizer afterwards.
Quick band guide
- 31–62 Hz — sub-bass rumble. Feel more than hear.
- 125–250 Hz — warmth and body; too much sounds muddy.
- 500 Hz–2 kHz — voice presence and intelligibility.
- 4–8 kHz — clarity, attack, sibilance.
- 16 kHz — "air" and sparkle.
FAQ
Can I use this as a bass booster?
Yes — hit the Bass Boost preset (or raise the 31–125 Hz sliders) and export. If you hear distortion, pull the low sliders back a couple of dB.
What do the 10 bands mean?
31–62 Hz is sub-bass, 125–250 Hz is warmth, 500 Hz–2 kHz is voice presence, 4–8 kHz is clarity, 16 kHz is air. Cutting is usually cleaner than boosting.
Is the preview the same as the exported file?
Yes — the same filter chain runs live for preview and offline for export, so what you hear is exactly what you download.