True Peak Out of Spec
"True Peaks Out of Spec” refers to program audio true peak maximum amplitude values that do not meet the specification guidelines.
True Peaks Out of Spec impacts the Technical quality of the asset. The peak levels of the asset do not meet the Netflix Delivery Specification.
Audio true peaks are above -2dBFS (+18dB above -20dBFS reference) outlined in the Netflix specifications.
How to Prevent:
Audio gain should also be monitored on set to avoid peak issues down the line.
When mixing audio, ensure peaks are being normalized to spec.
Monitor audio on timeline, and double check exports. Netflix will use Dolby Media Meter, Nugen LM Correct, or Baton Auto QC to check levels. Please use the same tools to measure/ verify for consistency.
Overall gain must be lowered to bring peak levels into spec compliance. Peaks must be limited and audio re-exported.
In cases where peaks are inconsistent throughout, re-mixing may be required. Also check audio peaks for M&E and redeliver as necessary.