How to use Parametric Audio Equalizer

Select a WAV and enter one name, frequency, Q, gain row per peaking band.
Check that each frequency is inside the range allowed by the source sample rate.
Apply the EQ, inspect the response plot and audition the WAV at a comfortable level.

Example: Parametric Audio Equalizer

Run a flat named band as a baseline.

You add

One-second mono WAV at 48 kHz. Bands: Reference, 1000, 1, 0.

You get

The band adds zero dB of equalization. The response is flat and the WAV preserves the source length and rate, subject to PCM16 export precision.

Supported inputs and limits

Selected files128 MiB total

Supported duration600 seconds

RIFF WAV only: mono/stereo PCM16, PCM24, PCM32 or float32 at 8–96 kHz; up to 128 MiB and 600 seconds. Compressed WAV, extended headers and other containers are refused. Work stays on your device. One to eight peaking bands. Frequencies: 20 Hz to min(20 kHz, 45% of sample rate); Q 0.1–12; gain -18 to +18 dB. No shelves or automatic tonal matching. The response plot excludes any global headroom reduction applied to the render. Band names allow up to 40 characters and cannot contain commas.

Where your input is processed

This tool processes your input in this browser. Your text and files are not uploaded to UseFreeTools. Check this tool's limits for anything it may save on your device.

Q controls the width of a peaking band

A higher Q affects a narrower band around the entered frequency. Several bands act in sequence, and their combined response can differ from one band considered alone. The plotted response describes the filters; it does not identify which frequencies your recording needs.

Boosting also uses headroom

Positive EQ boosts can request samples above full scale. A global headroom gain then reduces the whole render before PCM16 export. The plotted response describes the filters before that extra gain, so review both the response and the output report. The preset stores your named band definitions, without embedding the source audio or normalizing loudness.

Questions about Parametric Audio Equalizer

Can I use this as a graphic or shelving EQ?

It provides peaking biquad bands only. The named rows do not add shelving filters.

Why is a high frequency refused at a low sample rate?

Bands must be below 45% of the source sample rate as well as at or below 20 kHz. The valid range depends on the selected WAV.

Is my input uploaded?

Nothing is uploaded.

Project manager: Tony Hines · Content updated 4 October 2026 · Report a problem