---
title: 'Why audio files appear in the audio queue'
description: 'Why uploaded audio files are queued for conversion to MP3 for browser playback, and how artist, album and track metadata is extracted.'
url: https://www.medialab.co/support/troubleshooting/upload-processing/why-audio-files-appear-in-the-audio-queue
---

# Why audio files appear in the audio queue

All incoming audio files are automatically processed by MediaLab’s transcoding system to ensure browser playback. Non-MP3 files are converted into **MP3 format**.

If the source file is already an MP3, it will not be transcoded.

During this process, MediaLab also scans the file for metadata such as **artist, album, and track name**.