Understanding LUFS: The Complete Guide to Loudness Measurement

LUFS (Loudness Units relative to Full Scale) is the international standard for measuring perceived loudness in audio. Unlike peak meters that measure instantaneous signal level, LUFS accounts for how humans actually hear sound.

Why LUFS Matters

Every major streaming platform uses LUFS-based loudness normalization. If your master is too loud, it gets turned down. If it's too quiet, it gets turned up (or doesn't, depending on the platform). Understanding LUFS helps you make informed decisions about your mastering targets.

Integrated vs Short-term vs Momentary

There are three time scales of LUFS measurement:

• **Integrated LUFS**: The average loudness across the entire track. This is what streaming platforms use for normalization.
• **Short-term LUFS**: Measured over a 3-second sliding window. Useful for monitoring loudness variation.
• **Momentary LUFS**: Measured over a 400ms window. Shows instantaneous perceived loudness.

Platform Targets

Different platforms normalize to different levels. WhitePrint AudioEngine measures all three time scales and helps you optimize for your target platform.

How WhitePrint Measures LUFS

WhitePrint uses BS.1770-4 compliant measurement, the same standard used by broadcast organizations worldwide. Our analysis extracts integrated LUFS with gating as specified by the standard, ensuring your measurements match what streaming platforms will see.