Loudness and ITU-R BS.1770
Less than 1 minute
Loudness and ITU-R BS.1770
Professional loudness management for audio normalization and mastering.
What is Loudness?
Loudness is measured in LUFS (Loudness Units relative to Full Scale), using K-weighting to match human hearing.
Target Loudness Levels
| Standard | Target | Use Case |
|---|---|---|
| Television | -23 LUFS | Broadcast TV, streaming video |
| Streaming Music | -14 LUFS | Spotify, Apple Music |
| Film Theatrical | -27 LUFS | Cinema distribution |
| Film Home | -20 LUFS | Blu-ray, streaming film |
Loudness Measurement
# Measure loudness of audio file
audio-ninja loudness /path/to/audio.wav
# Output:
# Integrated Loudness: -18.5 LUFS
# Short-Term Loudness: -16.2 LUFS
# Loudness Range: 8.5 LULoudness Normalization
Automatically adjust audio to target loudness:
# Normalize to streaming music loudness
audio-ninja normalize /path/to/audio.wav --target-loudness -14.0
# Apply and save
audio-ninja normalize /path/to/audio.wav --target-loudness -14.0 --output normalized.wav