Parametric Equalizer
Dial in three bands by frequency, gain and Q, then equalize your audio right in the browser — nothing is uploaded.
About this tool
Parametric EQ lets you boost or cut exact frequency ranges instead of using fixed bass/mid/treble tone controls. Each of the three bands has:
- Frequency — the centre of the band in Hz, from 20 to 20000.
- Gain — how much to boost or cut, from -20 dB to +20 dB. A gain of
0turns that band off. - Q — bandwidth. Low Q values are wide and gentle; high Q values are narrow and surgical.
For example, set band 2 to frequency 3000, gain 4, Q 1.5 to add vocal presence. To reduce mud, set band 1 around 250, gain -5, Q 1.2. To add air, set band 3 around 10000, gain 4, Q 0.7.
The output is re-encoded to MP3 by default, or WAV, OGG, FLAC, or M4A if you choose another format. Album-art/video streams are dropped so the result is a clean audio file.
Limits
At least one band must have a non-zero gain; otherwise there is nothing to process. The tool applies three peaking EQ bands, not shelves, high-pass filters, or a live spectrum analyzer. Very large source files are capped by the standard audio upload limit, and boosted bands can cause clipping if the original audio already peaks near full scale — cut other bands or normalize first when in doubt.
FAQ
How is this different from the regular audio equalizer?
The regular audio equalizer has fixed bass, mid, and treble frequencies. This parametric EQ lets you choose the exact frequency and Q of every band, so it can target a narrow resonance, a specific vocal range, or a custom tonal shape.
What Q value should I use?
Use a low Q such as 0.7 for broad musical tone shaping, around 1 to 2 for normal corrective moves, and higher values such as 5 or more for narrow notches. Extremely narrow high-Q boosts can sound harsh, so use them carefully.
Why does a 0 dB band do nothing?
A gain of 0 dB means no boost and no cut, so that band is omitted from the ffmpeg filter chain. This keeps the output cleaner and avoids unnecessary filters.
Can boosting a band clip the audio?
Yes. Any positive gain raises part of the signal and may push peaks over full scale. If you hear distortion, reduce the boost, cut surrounding bands instead, or run a normalization/limiting tool after EQ.
Which output format should I choose?
Use MP3 for compact sharing, WAV or FLAC for lossless workflows, OGG for open web audio, and M4A when AAC compatibility is important. Re-encoding lossy input to another lossy format can reduce quality, so keep lossless sources when possible.
Developer & Automation Access
Run it from the terminal
Same engine as this page, headless — via the gizza CLI:
gizza tool parametric-eq 'url=https://example.com/input' 'band1_freq=100' 'band1_gain=0' 'band1_q=1' 'band2_freq=1000' 'band2_gain=0' 'band2_q=1' 'band3_freq=5000' 'band3_gain=0' 'band3_q=1' 'format=mp3'New to the CLI? Get gizza →
Open it by URL
Pre-fill and auto-run this tool with query parameters — the names match the API/CLI:
https://gizza.ai/tools/parametric-eq/?url=https://example.com/input&band1_freq=100&band1_gain=0&band1_q=1&band2_freq=1000&band2_gain=0&band2_q=1&band3_freq=5000&band3_gain=0&band3_q=1&format=mp3Machine-readable descriptor: tool.json — title + parameters JSON Schema for agents.