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Audio Binauralizer

Convert stereo to pseudo-3D or HRTF binaural

Uses stereo widening for pseudo-3D or SOFA-based HRTF if provided.

Click to upload file or drag and drop file here

Maximum file size: 200MB Supported formats: audio/*

Click to upload file or drag and drop file here

Maximum file size: 200MB Supported formats: application/octet-stream, application/x-hdf, .sofa

Key Facts

Category
Media
Input Types
file, select, number
Output Type
file
Sample Coverage
4
API Ready
Yes

Overview

The Audio Binauralizer converts stereo audio into immersive binaural sound. It supports pseudo-3D stereo widening for a broader soundstage or HRTF-based processing using SOFA files for realistic spatial audio, with adjustable parameters and multiple output formats.

When to Use

  • •When creating 3D audio experiences for headphones from stereo tracks.
  • •For enhancing podcasts or music with spatial effects to engage listeners.
  • •When preparing audio for virtual reality or immersive applications requiring accurate spatial cues.

How It Works

  • •Upload a stereo audio file in a supported format.
  • •Select binaural mode: pseudo-3D for stereo widening or HRTF with a SOFA file for precise spatialization.
  • •Adjust optional settings like stereo width, phase shift, and output gain.
  • •Choose an output format and download the processed binaural audio file.

Use Cases

Enhancing music mixes for a more immersive headphone listening experience.
Adding spatial depth to podcast audio to improve listener engagement.
Creating binaural sound effects for virtual reality games or simulations.

Examples

1. Enhance Podcast Audio for Headphones

Podcast Producer
Background
A podcast producer has stereo recordings that sound flat when listened to with headphones.
Problem
The audio lacks spatial immersion, making it less engaging for headphone users.
How to Use
Upload the podcast MP3 file, select pseudo-3D mode, set stereo width to 1.5, and output as AAC format.
Outcome
The podcast audio gains a wider soundstage, providing a more immersive experience for listeners.

2. Create Binaural VR Sound Effects

Background
A game developer needs spatial audio for a virtual reality environment.
Problem
Standard stereo sound effects do not provide accurate 3D positioning in VR.
How to Use
Upload WAV sound effects, use HRTF mode with a provided SOFA file, adjust output gain to 3 dB, and export as OGG.
Outcome
The sound effects are binauralized, delivering realistic spatial audio cues in the VR application.

Try with Samples

audio, file
Copyright-Free AAC Audio Samples
High-quality AAC encoded audio samples for testing and development, featuring nature sounds and meditation music with excellent compression
title token audio
audio
Copyright-Free MP3 Audio Samples
Collection of royalty-free audio samples for testing and development purposes including nature sounds, meditation music, and ambient audio
title token audio
audio
Copyright-Free WAV Audio Samples
Uncompressed PCM WAV audio samples for testing and development, mirrored from MP3 set with nature sounds and meditation music
title token audio
audio
Copyright-Free OGG Vorbis Audio Samples
Open-source OGG Vorbis audio samples for testing and development, featuring excellent compression with nature sounds and meditation music
title token audio
audio

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FAQ

What is binaural audio?

Binaural audio simulates 3D sound perception for headphone listening, creating an immersive spatial experience.

What is the difference between pseudo-3D and HRTF modes?

Pseudo-3D uses stereo widening for a wider soundstage, while HRTF uses SOFA files for accurate head-related spatial positioning.

What audio formats are supported for input?

You can upload common audio formats like MP3, WAV, AAC, and others supported by your browser.

Do I need a SOFA file for HRTF mode?

Yes, HRTF mode requires a SOFA file containing head-related transfer functions for processing.

Can I adjust the stereo width in pseudo-3D mode?

Yes, you can set the stereo width from 0.5 to 2 to control the spatial expansion effect.

API Documentation

Request Endpoint

POST /en/api/tools/audio-binauralizer

Request Parameters

Parameter Name Type Required Description
audioFile file (Upload required) Yes -
mode select No -
stereoWidth number No -
phaseShift number No -
sofaFile file (Upload required) No -
outputGain number No -
outputFormat select No -

File type parameters need to be uploaded first via POST /upload/audio-binauralizer to get filePath, then pass filePath to the corresponding file field.

Response Format

{
  "filePath": "/public/processing/randomid.ext",
  "fileName": "output.ext",
  "contentType": "application/octet-stream",
  "size": 1024,
  "metadata": {
    "key": "value"
  },
  "error": "Error message (optional)",
  "message": "Notification message (optional)"
}
File: File

AI MCP Documentation

Add this tool to your MCP server configuration: 

{
  "mcpServers": {
    "elysiatools-audio-binauralizer": {
      "name": "audio-binauralizer",
      "description": "Convert stereo to pseudo-3D or HRTF binaural",
      "baseUrl": "https://elysiatools.com/mcp/sse?toolId=audio-binauralizer",
      "command": "",
      "args": [],
      "env": {},
      "isActive": true,
      "type": "sse"
    }
  }
}

You can chain multiple tools, e.g.: `https://elysiatools.com/mcp/sse?toolId=png-to-webp,jpg-to-webp,gif-to-webp`, max 20 tools.

Supports URL file links or Base64 encoding for file parameters.

If you encounter any issues, please contact us at [email protected]