In this guide
Start with a flat curve and a specific audible problem. Make one small adjustment, compare at a similar level, and check for clipping. EQ changes frequencies shared by all sounds in the selected audio; it does not isolate a voice.
Audacity has two main equalizers: Filter Curve EQ, where you draw a frequency curve, and Graphic EQ, where you move fixed-frequency sliders. Select your audio and find them under Effect → EQ and Filters. Start flat, adjust one audible problem gently, and compare with the original at a similar level.
Equalization changes the level of frequency ranges across the selected audio. It can reduce rumble or change a voice's tone, but it cannot reliably separate a voice from music occupying the same frequencies or recover detail that was never recorded.
Which Audacity equalizer should you use?
| Tool | How it works | Useful when |
|---|---|---|
| Filter Curve EQ | Add and drag control points on a frequency-versus-gain graph. | You want to shape a broad area or place points at specific frequencies. |
| Graphic EQ | Adjust fixed-frequency sliders that form an EQ curve. | You prefer a bank of visible bands and quick small changes. |
| High-Pass Filter | Attenuate frequencies below a selected cutoff. | You are testing whether low rumble can be reduced without thinning the wanted voice. |
Audacity's EQ and Filters reference describes the available tools. If an older tutorial asks for an effect named “Equalization,” Audacity's legacy reference says it was superseded by Filter Curve EQ and Graphic EQ. The interface and menu organization can vary with version.
Use Filter Curve EQ on a voice recording
- Keep a reference. Save the source and work on a copy. Pick a short passage with a quiet phrase, a louder phrase and the problem you want to address. If you use volume envelopes or time-stretched clips, save the project first: Audacity's envelope documentation describes version-specific effects and rendering cautions.
- Open the effect. Select the passage and choose Effect → EQ and Filters → Filter Curve EQ. Use Reset to return to a flat curve if an earlier setting is present.
- Make one change. Click the curve to add a control point, then drag it. Frequency runs along the horizontal axis; gain in dB runs vertically. A point below the 0 dB line cuts that area, while a point above it boosts it. Neighboring points affect the curve's shape.
- Preview and compare. For example, if a recording sounds boomy, try a small, broad reduction in the low-mid region and listen to both quiet and loud phrases. Do not assume a particular frequency or amount will suit every microphone and voice.
- Apply only if it helps. Compare at a similar playback level: a louder version may seem clearer merely because it is louder. If words become thin or unnatural, reduce the adjustment or undo it.
The Filter Curve EQ manual explains adding and moving points, resetting the curve and changing the graph scale. Zooming the display changes the view, not the audio.
Use Graphic EQ instead
Select the audio and open Effect → EQ and Filters → Graphic EQ. Begin with the sliders at 0 dB, then move the band nearest the issue slightly down or up and preview. Adjacent bands influence the overall shape, so listen to the result across the phrase rather than treating each slider as an isolated source. Reset or undo if the change makes the recording worse.
Boosts can increase peaks and cause clipping. Check the output after processing; lower the gain or undo and use a gentler change if the signal distorts. Audacity's Graphic EQ manual also documents its controls and clipping considerations.
Choose the fix for the sound
- Low rumble: compare a gentle low-frequency reduction or high-pass filter. If the voice loses weight, back off.
- Muffled voice: first check the source, microphone placement and playback device. A slight EQ change may help, but it cannot recreate missing detail. See how to fix muffled audio.
- Steady hiss: a high-frequency cut can also dull consonants. Compare a noise-profile test using Audacity Noise Reduction.
- Music under speech: EQ changes overlapping voice and instruments together. Use original tracks if available, or compare a source-isolation estimate.
To inspect a tone, the audio spectrum analyzer shows a frequency snapshot from a selected moment of a supported short MP3 or WAV, locally in the browser. A peak shows energy at a frequency, not which person or instrument produced it. Use it alongside listening, not as a substitute for comparison.
What are the best Audacity EQ settings for voice?
There is no universal curve. The right adjustment depends on the voice, microphone, room and the rest of the mix. Start flat, change one thing at a time, and keep the version that improves intelligibility without unwanted artifacts. The vocal EQ guide explains how to make those decisions in a broader mixing workflow.