Audio Phase Analyzer

Real-time stereo phase correlation analyzer for mono compatibility checking

Professional phase analysis tool using Web Audio API. Visualizes stereo phase correlation with a goniometer-style display, correlation meter, and phase history graph. Essential for checking mono compatibility and detecting phase issues in stereo recordings.

Key Facts

Category
Images, Audio & Video
Input Types
text
Output Type
interactive
Sample Coverage
4
API Ready
Yes

Overview

The Audio Phase Analyzer is a professional, real-time stereo phase correlation tool designed to check mono compatibility and detect phase issues in your audio recordings. Using the Web Audio API, it provides instant visual feedback through a goniometer-style display, a correlation meter, and a detailed phase history graph to ensure your stereo mixes translate perfectly to mono playback systems.

When to Use

  • •When mixing stereo tracks and needing to verify that the audio will sound clear and full when summed to mono.
  • •When recording with multi-microphone setups to detect phase cancellation issues between channels.
  • •When mastering audio files to monitor stereo width and ensure the correlation meter stays consistently in the positive range.

How It Works

  • •Upload or play your stereo audio file directly in the browser to initialize the Web Audio API analyzer.
  • •Observe the goniometer-style display to visualize the stereo image spread and identify left-right channel imbalances.
  • •Monitor the real-time correlation meter and phase history graph to check if the phase relationship stays between 0 and +1.

Use Cases

Checking stereo synthesizer tracks or wide backing vocals for potential phase cancellation before final mixdown.
Analyzing field recordings or ambient stereo tracks to ensure natural spatial distribution without phase anomalies.
Verifying the mono compatibility of a completed master track before distributing it to streaming platforms.

Examples

1. Verifying Synth Bass Mono Compatibility

Electronic Music Producer
Background
A producer created a wide, chorus-heavy stereo synth bass line that sounds massive in headphones but completely disappears when played on a mobile phone speaker.
Problem
Identify if the stereo chorus effect is causing phase cancellation in the lower frequencies.
How to Use
Play the synth bass track through the analyzer and observe the correlation meter and goniometer display.
Outcome
The correlation meter dipped frequently into the -1 to 0 range, confirming phase cancellation. The producer adjusted the chorus width to keep the low-end mono-compatible.

2. Aligning Drum Overhead Microphones

Recording Engineer
Background
An engineer recorded a drum kit using an XY stereo microphone setup but suspects the microphones were slightly misaligned, causing a hollow snare sound.
Problem
Detect phase discrepancies between the left and right overhead channels.
How to Use
Load the overhead stereo bounce into the analyzer and monitor the real-time phase history graph during snare hits.
Outcome
The goniometer showed a tilted, asymmetrical pattern and the correlation meter dropped during snare hits, indicating a phase mismatch that was corrected by micro-aligning the tracks in the DAW.

Try with Samples

audio
GSM Audio Sample
GSM encoded audio sample for telephony playback, upload, and format conversion workflows
title token audio
audio
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 FLAC Audio Samples
Lossless FLAC audio samples for testing and development, mirrored from MP3 set with nature sounds and meditation music
title token audio
audio
Copyright-Free M4A Audio Samples
Apple iTunes compatible M4A audio samples with AAC encoding, optimized for quality and file size balance
title token audio
audio

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FAQ

What does a phase correlation value of -1 mean?

A value of -1 indicates that the left and right channels are 180 degrees out of phase, which will cause complete cancellation when summed to mono.

How do I read the goniometer display?

A vertical line represents a mono signal, a horizontal line represents out-of-phase stereo, and a balanced web-like shape indicates a healthy stereo image.

Does this tool upload my audio files to a server?

No, all audio processing and phase analysis are performed locally in your browser using the Web Audio API, ensuring complete privacy.

Why is mono compatibility important for my mixes?

Many playback systems, like club PAs, smartphones, and smart speakers, play audio in mono; poor compatibility leads to thin sound or missing instruments.

What is a healthy correlation meter reading?

A healthy stereo mix should mostly hover between 0 and +1, indicating positive correlation and good mono compatibility.

API Documentation

Request Endpoint

POST /en/api/tools/audio-phase-analyzer

Request Parameters

Parameter Name Type Required Description

Response Format

{
  "result": "Initial display content",
  "interactive": true,
  "components": [
    {
      "type": "timer",
      "id": "timer1",
      "config": {
        "label": "Countdown",
        "duration": 60
      }
    }
  ],
  "state": {
    "key": "value"
  },
  "actions": [
    {
      "type": "start",
      "id": "start-btn",
      "label": "Start"
    }
  ],
  "styles": "/* Custom CSS */",
  "scripts": "/* Client-side scripts */",
  "error": "Error message (optional)",
  "message": "Notification message (optional)",
  "metadata": {
    "key": "value"
  }
}
Interactive Component: Interactive Component

AI MCP Documentation

Add this tool to your MCP server configuration: 

{
  "mcpServers": {
    "elysiatools-audio-phase-analyzer": {
      "name": "audio-phase-analyzer",
      "description": "Real-time stereo phase correlation analyzer for mono compatibility checking",
      "baseUrl": "https://elysiatools.com/mcp/sse?toolId=audio-phase-analyzer",
      "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.

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