Fix or Normalise (up to version 6.4 only)?

Eff versions between V2.3 and V6.4
Eff uses the terms ‘fix’ and ‘normalise’.  When Eff ‘fixes’ a file, it compares the loudness (or PPM etc as configured) to the target. If the measured maximum value exceeds the target, the level in the file is reduced. If the measured maximum value is lower than the target, the file is not changed.  When Eff ‘normalises’ a file, where the level is too high, it is reduced, but if the maximum measured value is lower than the target value, then the level in the file is increased.


This dialog shows the Eff fix and normalise options. As shown here, the incoming file will be tested for short term loudness, long term (gated) loudness, a PPM threshold, and a True Peak threshold.



The first three values are included in the ‘normalise’ settings, so the audio level in the entire file will be lifted or reduced linearly, so that whichever of those values is nearest to a threshold ends up exactly hitting that threshold. However since the ‘Fix to True Peak’ is also enabled, the level of audio will never exceed that threshold. Note that with the True Peak measurement, the audio level will never be increased to specifically meet a True Peak value, but instead this is used to ensure that the chosen maximum True Peak value is never exceeded.


Of course, whilst Eff measures the three different loudness types defined in EBU R128, the threshold values for each measurement can be set individually.

Select one of the following for more information:-

Iain Davies

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