LUFS without mythology: what the number is for
LUFS is useful for comparing perceived program level over time. It is not a mastering grade.
Diagnosis
- Measure the relevant time window.
- Compare references at matched playback level.
- Read LUFS together with true peak and dynamics.
Decision
- Set a delivery target only when a destination requires one.
- Keep musical dynamics if they survive the delivery constraint.
- Use level normalization for comparison before changing processing.
Measurement boundary
Two masters at the same LUFS can sound radically different because spectrum, crest factor and distortion differ.
Common failure: Chasing a platform number by limiting harder can reduce quality without improving playback level.