Audio Normalization
This flow element will normalize audio against the matching tracks in the output file using FFmpeg's loudnorm filter.
All Audio Tracks
When this is checked all audio tracks will be normalized, otherwise only the first audio track will be normalized.
This is ignored if a Pattern is set.
Mode
How the audio is analyzed before it is normalized.
| Mode | Description |
|---|---|
| Single Pass | No additional processing is required, the loudnorm filter is applied directly using the Target values. This is the fastest, and will provide decent results but not as good as a two pass. |
| Two Pass | The source audio track is scanned when this flow element is executed, and the measured values are used to build a filter that accurately normalizes that track. This offers the highest accuracy. |
| Two Pass Limited | The same as Two Pass, but only a sample of the audio is analyzed for quicker results. For audio longer than 5 minutes, 20% of the audio is analyzed, up to a maximum of 10 minutes. |
When using a two pass mode, if multiple output tracks use the same source track, they will reuse the filter and the source track will not be reanalyzed.
So for example, if you remove all audio, add AC3, add AAC then normalize. The source track for AC3 and AAC will be the same, so the audio normalization analysis will only need to be run once.
Target
The loudness target to normalize the audio to.
| Target | Integrated Loudness | Loudness Range | True Peak | Description |
|---|---|---|---|---|
| Night Mode | -28 LUFS | 4 LU | -3 dBTP | Quieter, with a reduced dynamic range to quiet loud action scenes while boosting quiet dialogue for evening listening. |
| Cinema | -24 LUFS | 11 LU | -2 dBTP | Preserves a wide dynamic range for immersive cinema like audio setups. |
| Standard | -14 LUFS | 8 LU | -1 dBTP | Balanced normalization optimized for everyday TV viewing. This is the default. |
| Custom | Set the loudness values yourself using the fields below. |
These are the same targets used by the normalization modes in Formulas.
Target Integrated Loudness
Only shown when Target is Custom.
Controls the overall perceived loudness of the audio in LUFS. Higher values (closer to 0) produce louder audio.
Typical broadcast target is -24 LUFS, while streaming platforms may prefer -14 LUFS.
Range: -36 to -8. Default: -14.
Target Loudness Range
Only shown when Target is Custom.
Defines how much variation in loudness is allowed across the program, in LU. Smaller values reduce the dynamic range, making quiet and loud parts closer in volume.
Range: 4 to 20. Default: 8.
Maximum True Peak
Only shown when Target is Custom.
Prevents audio peaks from exceeding this ceiling in dBTP to avoid clipping or distortion. Typical values are -1.0 to -2.0 dBTP.
Range: -6 to -1. Default: -1.
Pattern
This is a regular expression that will be run against the title, language code, and codec of the audio track.
The pattern is NOT case-sensitive.
Not Matching
This will inverse the match
Outputs
- Audio tracks matched the parameters and will be normalized
- Audio tracks did not match and no normalizing will occur