# Audio Phase Fix

Fix phase and stereo width issues

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

- **Category:** Media

- **Keywords:** audio, phase, stereo, width, alignment

## Overview

Adjusts stereo width and phase alignment using FFmpeg stereo tools.

## Inputs

- **Audio File** (file): Select an audio file
- **Stereo Width** (number): 1.0
- **Phase Shift (degrees)** (number): 0
- **Output Format** (select)

## When to use

- When audio recordings suffer from phase cancellation, resulting in a thin or hollow sound.
- To expand or narrow the stereo width for a more immersive or focused audio experience.
- When aligning phase between multiple audio tracks during mixing or post-production.

## How it works

- Upload an audio file in a supported format such as MP3, WAV, or FLAC.
- Adjust the stereo width parameter from 0 (mono) to 2 (expanded stereo) to control the spatial spread.
- Set the phase shift in degrees to correct timing issues between left and right channels.
- Select an output format and process the file to download the phase-corrected audio.

## Use cases

- Podcast production to fix phase issues from multi-microphone setups.
- Music mixing to enhance stereo imaging and spatial effects.
- Audio restoration for correcting phase problems in vintage recordings.

## Frequently asked questions

### What does phase shift do in audio processing?

Phase shift adjusts the timing offset between the left and right audio channels to correct phase cancellation, which can improve sound clarity and fullness.

### What audio file formats can I upload?

You can upload audio files in common formats like MP3, AAC, M4A, OGG, Opus, FLAC, and WAV.

### Can I convert stereo audio to mono with this tool?

Yes, by setting the stereo width to 0, you can effectively convert stereo audio to mono.

### Is there a limit on the audio file size?

Yes, the audio file must be under 200 MB to be processed.

### How does adjusting stereo width affect the audio?

Stereo width controls the perceived space between channels; values above 1 widen the stereo image, while values below 1 narrow it towards mono.

## Related tools

- [Audio Kick-Bass Phase Aligner](https://elysiatools.com/en/tools/audio-kick-bass-phase-aligner): Compare kick and bass timing/phase in the low band, report the offset and polarity, and export the corrected track with sample-accurate alignment.
- [Audio Balance](https://elysiatools.com/en/tools/audio-balance): Adjust the volume balance between left and right channels
- [Audio Channel Swap](https://elysiatools.com/en/tools/audio-channel-swap): Swap the left and right channels of a stereo file
- [Audio Click/Pop Fix](https://elysiatools.com/en/tools/audio-click-pop-fix): Repair short clicks and pops with threshold detection
- [Invert Channel Phase](https://elysiatools.com/en/tools/audio-invert-phase): Invert the phase of one channel (for vocal removal effect)
- [Audio Podcast Loudness Compliance Report](https://elysiatools.com/en/tools/audio-podcast-loudness-compliance-report): Compare integrated LUFS, true peak, LRA, stereo/mono, bitrate and sample rate against Apple Podcasts, Spotify, YouTube, ACX and broadcast targets.
- [Assistive Listening Enhancer](https://elysiatools.com/en/tools/audio-assistive-listening-enhancer): Clarify listening audio with low-frequency cleanup, speech-presence EQ, conservative denoising, and level protection.
- [Audio Audiobook Room Tone Inserter](https://elysiatools.com/en/tools/audio-audiobook-room-tone-inserter): Add the required lead-in, lead-out silence, and room tone between audiobook chapters for ACX-compliant submission.

## 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 Channel Routing and Delivery Verification](https://elysiatools.com/en/hubs/audio-channel-routing): Route, split, join, and convert mono or stereo audio while preserving left/right intent and checking the final file before delivery.