DaVinci Resolve Audio Loudness Workflow: Meeting LUFS Standards for OTT Compliance
Ensure your audio mix passes OTT quality control. Master the DaVinci Resolve audio loudness workflow to hit exact LUFS targets for Netflix and broadcast delivery.
How do you set up a DaVinci Resolve audio workflow to meet LUFS standards for OTT compliance?
To meet LUFS standards, open the Fairlight page, route your final mix to the Main Bus, apply the Fairlight FX "Loudness Meter," set the target to the required spec (e.g., -23 LUFS for broadcast or -24 LKFS for Netflix), and use a True Peak Limiter to prevent clipping.
Delivering a film or documentary to a major streaming platform (OTT) like Netflix or Amazon Prime requires strict adherence to audio compliance standards. If your audio mix is too loud or too dynamic, the platform’s automated Quality Control (QC) bots will instantly reject the file. Traditional audio meters measure peak volume (the loudest instantaneous sound), which is useless for compliance. OTT platforms measure Loudness Units relative to Full Scale (LUFS), which calculates the perceived average loudness over the entire duration of the program. By utilizing DaVinci Resolve’s built-in Loudness Meter on the Main Bus, you can analyze the entire timeline and adjust your mix to hit the exact -24 LUFS target.
What is the difference between Integrated Loudness and True Peak?
Integrated Loudness (LUFS) measures the average perceived volume of the entire video from start to finish, while True Peak measures the absolute highest microscopic audio spike to ensure it never distorts or clips the digital signal.
When a network provides an audio spec sheet, they will typically demand an Integrated Loudness of -23 LUFS (or -24) and a Maximum True Peak of -2 dBTP. This means the overall "feel" of the dialogue and music must average out to -23 over the hour-long show. However, if a sudden explosion or gunshot occurs, that specific sound effect is allowed to be much louder, as long as the absolute peak never exceeds -2 dBTP. If a sound hits 0 dB, the digital signal clips, creating harsh, crackling distortion. Applying a Limiter to your Main Bus ensures the True Peak never crosses the threshold.
How should audio engineers present final LUFS-compliant mixes for approval?
Audio engineers should render the compliant mix and upload the video to Cutsio, providing a white-labeled, frictionless presentation layer where producers can review the audio securely without compression artifacts.
Approving a final audio mix is a critical milestone. Sending a massive video file via a generic cloud drive often results in the producer streaming a highly compressed proxy where the audio has been degraded by the browser player. By uploading the master file to Cutsio, you ensure the producer hears the exact LUFS-compliant mix in a branded, secure environment. Cutsio guarantees high-fidelity playback, and its explicit approval gates allow the producer to sign off on the mix before it is shipped to the network.
FAQ
What does LUFS stand for?
LUFS stands for Loudness Units relative to Full Scale. It is an international standard measurement designed to reflect how the human ear actually perceives volume.
Is LKFS the same as LUFS?
Yes, for all practical mixing purposes, LKFS (Loudness K-weighted Full Scale) and LUFS are identical measurements used interchangeably by different broadcasting organizations.
How do I fix a mix that is -27 LUFS when the target is -24 LUFS?
If your mix is too quiet (-27 is lower than -24), you must raise the overall gain of your Main Bus by 3 dB, ensuring your True Peak limiter is still engaged to catch any spikes.