Loudness LKFS Measurement
"LKFS Loudness Out of Spec" refers to an audio mix that does not conform to the average overall loudness specification.
LKFS Loudness Out of Spec impacts the Technical Quality of the asset. The asset does not meet the Netflix Specification. Any derivatives of this asset will not meet the Netflix Specification.
LKFS or True Peak or both measurements are outside of the Netflix specified parameters, above or below, there is no gray area.
How to Prevent:
Monitor audio on timeline, and double check exports. Netflix will use Dolby Media Meter or FFmpeg to check levels. Use the same tools when possible for consistency.
Loudness must be adjusted to bring the file into spec.
Lower or raise overall volume and re-export.