Audio Phase Analyzer

Audio Phase Analyzer | Online Free Tool | Elysia Tools

Tool usage guide

Learn when to use this tool, what it supports, and how real users apply it.

Key facts

Category: Media
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

1Upload or play your stereo audio file directly in the browser to initialize the Web Audio API analyzer.
2Observe the goniometer-style display to visualize the stereo image spread and identify left-right channel imbalances.
3Monitor 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

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.

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Learn when to use this tool, what it supports, and how real users apply it.

Key facts

Overview

When to use

How it works

Use cases

Examples

1. Verifying Synth Bass Mono Compatibility

2. Aligning Drum Overhead Microphones

FAQ

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