# Audio Phase Analyzer

Real-time stereo phase correlation analyzer for mono compatibility checking

> Canonical page: https://elysiatools.com/en/tools/audio-phase-analyzer

- **Category:** Media

- **Keywords:** audio, phase, correlation, stereo, mono, compatibility, goniometer, analysis

## Overview

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.

## 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.

## Frequently asked questions

### 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.

## Related tools

- [Audio Mix Translation Checker](https://elysiatools.com/en/tools/audio-mix-translation-checker): Simulate your mix on phone, laptop, earbud, car, club, mono and noisy-street playback, export every render in a ZIP, and report what survives each system.
- [Audio Frequency Analyzer](https://elysiatools.com/en/tools/audio-frequency-analyzer): Real-time audio frequency spectrum analyzer with detailed frequency band analysis
- [Audio Dictation Quality Checker](https://elysiatools.com/en/tools/audio-dictation-quality-checker): Check whether audio is suitable for transcription using SNR, clipping, format, channels, and speech activity.
- [Audio Stereo Correlation Meter](https://elysiatools.com/en/tools/audio-stereo-correlation-meter): Visualize stereo phase correlation for mono compatibility checks
- [Audio Caption Sync Checker](https://elysiatools.com/en/tools/audio-caption-sync-checker): Compare SRT or WebVTT cue timing with likely speech activity and flag timing drift.
- [Audio Duration Checker](https://elysiatools.com/en/tools/audio-duration-checker): Get the exact duration of an audio file
- [Audio Platform Delivery Checker](https://elysiatools.com/en/tools/audio-platform-delivery-checker): Check podcast or spoken-audio files against platform delivery profiles, including codec, loudness, metadata, chapters, cover art, and decodability.
- [3D Spectrum Analyzer](https://elysiatools.com/en/tools/audio-spectrum-analyzer-3d): Audio spectrum analyzer with 3D isometric visualization

## Samples

- [Copyright-Free FLAC Audio Samples](https://elysiatools.com/en/samples/flac-samples): Lossless FLAC audio samples for testing and development, mirrored from MP3 set with nature sounds and meditation music
- [Copyright-Free MP3 Audio Samples](https://elysiatools.com/en/samples/mp3-samples): Collection of royalty-free audio samples for testing and development purposes including nature sounds, meditation music, and ambient audio
- [Copyright-Free WAV Audio Samples](https://elysiatools.com/en/samples/wav-samples): Uncompressed PCM WAV audio samples for testing and development, mirrored from MP3 set with nature sounds and meditation music
- [Copyright-Free Raw PCM Audio Samples](https://elysiatools.com/en/samples/pcm-samples): Raw PCM s16le audio samples featuring nature ambience and relaxing music for waveform, playback, and conversion workflows

## Related content

- [Audio Analysis and Visualization Tools](https://elysiatools.com/en/hubs/audio-analysis-and-visualization-tools): Visualize audio, inspect stereo, diagnose signal and timing, and check files before delivery.