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Maximka1993271 edited this page Jul 26, 2026 · 1 revision

❓ Frequently Asked Questions

General Questions

❔ What is SoundForge Equalizer?

SoundForge Equalizer is a free, open-source 10-band audio equalizer for Firefox and Edge browsers. It processes audio from any website in real-time.

❔ Is it really free?

Yes! Completely free and open-source under the MIT License.

❔ Does it collect my data?

No. All audio processing is local. No tracking, telemetry, ads, or data collection.

Installation

❔ How do I install it?

See the Installation Guide.

❔ Firefox blocks the XPI installation. What do I do?

Firefox blocks unsigned extensions by default. Disable signature verification:

  1. Open about:config
  2. Search for xpinstall.signatures.required
  3. Set to false
  4. Restart Firefox

Usage

❔ How do I use the equalizer?

  1. Click the extension icon
  2. Click "Connect"
  3. Adjust frequency sliders

❔ Why is there no sound?

Check:

  • The extension is connected (green status)
  • Volume is not at 0%
  • The audio source is playing
  • Try refreshing the page

❔ What does 0% volume do?

0% volume enables hard mute — completely silences all audio at the source level.

❔ Why is the volume range 0-800%?

This allows both quiet and very loud listening. 100% is standard, 800% is maximum.

Presets

❔ How many presets are there?

50+ built-in presets + unlimited user presets.

❔ Can I create my own presets?

Yes! Adjust the sliders and click "Save Preset".

Technical

❔ How does it work?

The extension uses:

  1. HTMLMediaElement.captureStream() to capture audio
  2. Web Audio API for real-time processing
  3. BiquadFilterNode for EQ bands
  4. AnalyserNode for visualization

❔ Why does it need <all_urls> permission?

To capture audio from any website and process it through the equalizer.

❔ Does it work on YouTube, Spotify, etc.?

Yes! It works on most websites with HTML5 audio/video elements.

Troubleshooting

❔ EQ is not working

  1. Make sure the extension is connected
  2. Try refreshing the page
  3. Try restarting the browser
  4. Check the console (F12 → Console)

❔ Audio is distorted

  1. Reduce the volume
  2. Lower the bass boost
  3. Check for clipping warnings

❔ Spectrum analyzer shows nothing

  1. Verify the extension is connected
  2. Check that audio is playing
  3. Try a different website

Security

❔ Is this safe?

Yes! The code is fully open-source. No data is sent anywhere — all processing is local.

❔ Can I trust the XPI file?

Only if downloaded from the official GitHub releases page. Never download from other sources.

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