Audio Equalizer Online — Adjust Frequencies Free
Last Updated: April 1, 2026
Last updated: 2026-03-09
Your podcast recording sounds muddy. Your music track has too much bass. Your voice memo has a tinny quality. An equalizer lets you boost or cut specific frequency ranges to fix these problems.
Frequency Bands Explained
| Band | Frequency | What It Controls | Common Adjustments |
|---|---|---|---|
| Sub-bass | 20-60 Hz | Rumble, vibration | Cut to remove room noise |
| Bass | 60-250 Hz | Warmth, body | Boost for thin recordings |
| Low-mid | 250-500 Hz | Fullness, muddiness | Cut to reduce muddiness |
| Mid | 500-2k Hz | Presence, clarity | Boost for vocal clarity |
| Upper-mid | 2k-4k Hz | Edge, definition | Boost for speech intelligibility |
| Presence | 4k-6k Hz | Brightness, detail | Boost for crisp vocals |
| Brilliance | 6k-20k Hz | Air, sparkle | Cut to reduce harshness |
Quick Presets
- Voice clarity: Cut 200-400 Hz, boost 2-4 kHz
- Bass boost: Boost 60-120 Hz by 3-6 dB
- Remove muddiness: Cut 200-500 Hz by 3-4 dB
- Podcast: High-pass at 80 Hz, slight boost at 3 kHz
Equalize your audio — 10-band EQ, free, instant.
Open Audio Equalizer →Related Tools
According to Sound On Sound, subtractive EQ (cutting problem frequencies) generally produces better results than additive EQ.
As iZotope recommends, always EQ with purpose — identify the problem frequency first, then adjust.
Frequently Asked Questions
Is this audio tool free?
Yes, all audio tools on MP3-AI.com are completely free to use.
What audio formats are supported?
We support MP3, WAV, AAC, FLAC, OGG, M4A and most common audio formats.
Is my audio file kept private?
Audio files are deleted from our servers immediately after processing.
What is the maximum audio file size?
We support audio files up to 500MB.
Can I process multiple files at once?
Yes, batch processing is available for most audio tools.
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