Audio Loudness Standards: LUFS, dBFS, and Normalization
Different platforms have different loudness requirements. Understanding LUFS, dBFS, and normalization ensures your audio plays at the right volume on Spotify, Apple Music, YouTube, and broadcast systems.
Key Takeaways
- Inconsistent loudness between tracks or episodes creates a poor listening experience.
- dBFS measures instantaneous peak levels relative to the maximum digital value.
- Adjusts gain so the highest peak reaches a target level.
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Why Loudness Matters
Inconsistent loudness between tracks or episodes creates a poor listening experience. Streaming platforms apply their own normalization, which can either turn down or turn up your audio — and turning up reveals noise.
Key Measurements
dBFS (Decibels Full Scale)
dBFS measures instantaneous peak levels relative to the maximum digital value. 0 dBFS is the absolute maximum — anything higher clips.
LUFS (Loudness Units Full Scale)
LUFS measures perceived loudness over time, accounting for how human ears respond to different frequencies. It's the standard for broadcast and streaming.
Platform Targets
| Platform | Target LUFS | True Peak |
|---|---|---|
| Spotify | -14 LUFS | -1 dBTP |
| Apple Music | -16 LUFS | -1 dBTP |
| YouTube | -14 LUFS | -1 dBTP |
| Podcast (mono) | -19 LUFS | -1 dBTP |
| Broadcast (EU) | -23 LUFS | -1 dBTP |
Normalization Methods
Peak Normalization
Adjusts gain so the highest peak reaches a target level. Simple but doesn't guarantee consistent perceived loudness.
Loudness Normalization
Adjusts gain so the integrated LUFS matches a target. This produces perceptually consistent volume across different audio content.
Practical Workflow
- Mix your audio with peaks around -6 to -3 dBFS.
- Apply a limiter with a ceiling of -1 dBTP.
- Measure integrated LUFS.
- Adjust gain to reach the target LUFS for your platform.
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