How to prepare an audio file before publication or upload?
Complete guide to prepare your audio files before publication: format, quality, metadata and optimization for each platform.
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Publishing an audio file online should not be taken lightly. Whether you're uploading music, a podcast, a soundtrack or an educational file, the preparation beforehand determines the quality of the experience for your listeners.
A poorly prepared file can be rejected by platforms, poorly played by some devices, or simply offer disappointing quality. Conversely, a well-optimized file loads quickly, sounds perfect, and integrates seamlessly into the distribution ecosystem.
This complete guide walks you through all the preparation steps: from format choice to final optimization, including metadata and quality control.
Table of contents
Complete preparation workflow
Preparing an audio file for publication follows a 5-key step process, each crucial for the final result. 1. SOURCE VERIFICATION: Ensure the starting file is of the best possible quality. You can't improve a degraded file. 2. FORMAT CHOICE: Select the format, bitrate and technical parameters suited to the destination (Spotify, podcast, web, etc.). 3.
Step 1: Source file verification
Before any manipulation, examine your source file. It's the foundation of everything that follows. ORIGINAL QUALITY: Ideally, start from an uncompressed file (WAV, AIFF) or lossless (FLAC). If your source is an MP3, you cannot improve its quality by converting it. SAMPLE RATE: Note the current frequency. 44.1 kHz is the standard, 48 kHz for video.
Step 2: Format and parameter choice
Export format depends entirely on your destination. Here are recommendations by platform: SPOTIFY/APPLE MUSIC (via distributor): WAV or FLAC, 44.1 kHz, 16 or 24 bits. No compression at this stage. SOUNDCLOUD: MP3 320 kbps or FLAC for Pro accounts. 44.1 kHz, stereo. YOUTUBE: If in a video, let video encoding handle audio.
Step 3: Audio processing (if necessary)
Depending on your source file condition and destination requirements, some processing may be necessary. LOUDNESS NORMALIZATION: Adjust integrated loudness to your platform's target (-14 LUFS for Spotify/YouTube, -16 LUFS for podcasts). Convertly Audio can display and adjust loudness. TRUE PEAK LIMITING: Ensure peaks don't exceed -1 dB True Peak to.
Step 4: Metadata and artwork
Metadata is what listeners see in their players. Well-crafted metadata reflects your professionalism. TITLE: The exact title of the track or episode. Check spelling and capitalization. ARTIST: Your artist name or podcast name. Consistent with your other publications. ALBUM: For music, the album name. For podcasts, the show name.
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Try the toolHow to do it in 3 steps
Import your source file to Convertly Audio to analyze its characteristics and identify necessary adjustments.
Select the target format and parameters suited to your destination platform, then apply processing (loudness, fades).
Fill in metadata, download the final file, perform quality control then publish.
Pro tips
- Create a project template with your standard settings for each type of publication.
- Always prepare multiple versions (high quality for distribution, optimized for web, etc.) in a single session.
- Keep a log of your publications with parameters used for future reference.
Common mistakes to avoid
- ✗Starting from a compressed source file (MP3 128 kbps) for professional distribution. Solution: always keep high quality source files.
- ✗Forgetting to check loudness and having sound too quiet or too loud. Solution: normalize to -14 LUFS for streaming.
- ✗Not listening to exported file and publishing a file with a glitch. Solution: ALWAYS listen before publication.
- ✗Inconsistent metadata across platforms. Solution: prepare metadata once and apply everywhere.
- ✗Low resolution artwork that pixelates on large screens. Solution: use minimum 3000x3000 pixels.
- ✗Publishing without backup and losing original file. Solution: systematically archive before publication.
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