Basic Audio Equalizer for Bass and Treble Adjustment
This equalizer adjusts bass (low frequencies below 250 Hz) and treble (high frequencies above 4 kHz) using simple slider controls. Each band can be boosted or cut by up to 12 dB. Processing happens in your browser using Web Audio API filters.
The bass control uses a low-shelf filter affecting everything below 250 Hz. The treble control uses a high-shelf filter affecting everything above 4 kHz. Mid frequencies (250 Hz to 4 kHz) remain unaffected.
Who Uses Basic EQ
- Podcasters who recorded but their voice sounds thin. They boost bass by +3 dB to add warmth and body.
- Musicians who have a mix that sounds too bright. They cut treble by -4 dB to reduce harshness.
- Listeners using bass-heavy headphones reduce bass by -6 dB to compensate for the headphone's sound signature.
- Content creators who have audio with rumble from wind or handling noise. They cut bass by -8 dB to clean it up.
- Audio enhancers who want to make vocals more present without affecting the overall mix. They boost treble by +2 dB for clarity.
What to Know Before Using It
- This is a 2-band EQ, not a full parametric equalizer. You can't target specific frequencies like "cut 400 Hz" or "boost 3 kHz."
- The bass and treble controls interact. Boosting both might create a "smile" EQ curve that sounds scooped.
- Extreme boosts (+10 dB or more) can introduce distortion or artifacts. Subtle adjustments (±3-6 dB) usually sound better.
- This isn't a replacement for proper mixing EQ. It's for broad tonal adjustments, not surgical frequency correction.
- Output is MP3 format. If you're doing professional audio work, use a DAW with higher-quality EQ plugins.
FAQ
- What frequencies do bass and treble control?
- Bass affects frequencies below 250 Hz (low end, warmth, rumble). Treble affects frequencies above 4 kHz (brightness, air, sibilance).
- Can I adjust midrange frequencies?
- No—this is a basic 2-band EQ. For midrange control, you need a 3-band or parametric equalizer.
- What's a good starting point for EQ?
- Make small adjustments (±2-4 dB) and listen. Cut problem frequencies rather than boosting desired ones when possible.
- Will EQ fix bad recordings?
- It can help, but EQ can't add what wasn't recorded. A thin recording can be warmed up slightly, but it won't become rich.
- Does EQ affect volume?
- Boosting increases volume; cutting decreases it. The effect is frequency-dependent, not uniform across all frequencies.
- Can I preview the EQ before downloading?
- No—this is a process-and-download tool. For real-time EQ preview, use audio editing software or a media player with EQ.