International standard for streaming platforms with normalization to -14 LUFS (Loudness Units relative to Full Scale).
Technical Fundamentals
LUFS stands for "Loudness Units relative to Full Scale" and is a psychoacoustic unit of measurement that indicates the perceived loudness of an audio signal – as opposed to linear dB measurements, which are technically precise but do not account for how the human ear actually perceives sound.
-14 LUFS is the target value standardized by streaming platforms for Integrated Loudness, measured over the entire duration of a track.
Measurement Methods
There are three measurement methods for loudness:
- Integrated Loudness: The average value over the entire file – this is the value that should be -14 LUFS
- Short-term Loudness: Measurements over 3-second windows, showing loudness fluctuations
- Momentary Loudness: Real-time measurement based on 400ms windows
The True Peak value should not exceed -1.0 dBFS to avoid clipping.
Standards and Platforms
| Platform | Standard |
|---|---|
| Spotify | -14 LUFS |
| YouTube Music | -14 LUFS |
| Apple Music | -16 LUFS |
| Amazon Music | -14 LUFS |
| TV/Broadcast | -24 LUFS |
Practice in Mixing and Mastering
Workflow for -14 LUFS Mastering
- Mixing Phase: Keep the final target of -14 LUFS in mind during mixing
- Metering: Use tools like Youlean Loudness Meter or iZotope RX
- Master Processing: Employ a Multiband Compressor and Limiter with a -1.0 dBFS ceiling
- A/B Testing: Compare with commercial streaming tracks
Common Mistakes
- Overly aggressive compression: Destroys dynamics and leads to listening fatigue
- Ignoring True Peak limits: Causes clipping artifacts
- Insufficient headroom: Plan for at least -6 dB headroom for mastering
Practical Checklist
- Integrated Loudness between -14.5 and -13.5 LUFS
- True Peak not exceeding -1.0 dBFS
- Short-term Loudness without wild peaks (max. ±3 LUFS variation)
- A/B comparison with reference tracks
- Export as PCM WAV or FLAC (16-bit or higher)
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