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Equalizer Extension

A comprehensive parametric equalizer extension that provides real-time audio equalization capabilities for modernGraphTool.

Overview​

The Equalizer extension adds a full-featured parametric equalizer panel to modernGraphTool, allowing users to apply real-time audio filters to their headphone measurements.

It supports multiple filter types, preamp control, and audio playback with EQ effect applied.

Features​

  • Parametric EQ: Support for multiple filter types (PEQ, LSQ, HSQ, etc.)
  • Real-time Audio: Toggle EQ filters to audio playback in real-time
  • Filter Management: Add, remove, and modify EQ bands dynamically
  • Phone Selection: Quick selection and switching between different headphone measurements
  • Auto EQ Generation: Generate automatic EQ profiles based on target curves
  • Import/Export: Support for importing and exporting EQ settings
  • File Upload: Upload custom frequency response and target files

Technical Specifications​

PropertyValue
Extension Nameequalizer
Latest Version1.0.1
Minimum Core API Level1
Minimum Core Version1.0.0
I18N SupportYes

Configuration​

{
  NAME: "equalizer",
  DESCRIPTION: "equalizer panel for modernGraphTool",
  ENABLED: true,
  I18N_ENABLED: true,
  CONFIG: {
    INITIAL_EQ_BANDS: 5,    // Number of Equalizer Bands at start
    MAXIMUM_EQ_BANDS: 20,   // Maximum Number of Equalizer Bands
  },
}

Configuration Options​

  • INITIAL_EQ_BANDS: Sets the number of EQ bands available when the extension first loads
  • MAXIMUM_EQ_BANDS: Defines the maximum number of EQ bands that can be created

Installation​

  1. Ensure the equalizer folder is present in your extensions directory
  2. Add the configuration to extensions/extensions.config.js
  3. Enable the extension by setting ENABLED: true
  4. Restart modernGraphTool to load the extension

Usage​

  1. Basic EQ: Use the filter controls to adjust frequency, gain, and Q values
  2. Phone Selection: Use the phone selector to switch between different measurements
  3. Audio Playback: Enable audio playback to hear EQ changes in real-time
  4. Auto EQ: Generate automatic EQ profiles based on selected target curves
  5. Import/Export: Save and load EQ settings using the import/export functions

Notes​

  • The extension requires a modern browser with Web Audio API support for audio features
  • Real-time audio processing may cause increased CPU usage
  • Large numbers of EQ bands may impact performance on older devices

Events​

The extension emits and listens to several custom events:

  • equalizer:auto-eq-generated: Fired when auto-EQ is generated (detail: uuid)
  • equalizer:filters-changed: Fired when filter values change (detail: filters)
  • equalizer:select-changed: Fired when selection changes (detail: type/uuid)
  • equalizer:select-removed: Fired when selection is removed