Metanormalizer de wavelab...
The Meta Normalizer (Audio Montage)
The Audio Montage Meta Normalizer serves two purposes: to equalize the loudness between all Clips (useful e.g. when producing a CD) and to ensure that the full mixdown of the Montage will never clip. The normalizing is done in a non destructive way, by adjusting gain settings for the different Clips. In other words, using the Meta Normalizer will not affect the source audio files.
The Meta Normalizer operates in two or three passes. It first analyses the peak or RMS levels on all Clips in the Montage. Then it processes the Clips according to the highest possible level found amongst the Clips, so that they will all play back at equal peak or RMS levels. This is achieved by automatically raising or lowering each Clip's "Gain" setting in the Clip list.
Setting
Description
Equalize Clip Volume
When this is activated, the Meta Normalizer will normalize all Clips in the Montage, by adjusting their gain settings, so that they all play back at equal levels.
Equalize Peal Level
Select this option if you want to use peak levels as a basis for determining what is considered "equal level" when executing Equalize Clip Volume.
Equalize Loudness (RMS)
Select this option if you want to use RMS (Root Mean Square) levels as a basis for determining what is considered "equal level" when executing Equalize Clip Volume. RMS normally produces more natural results than using Peak levels, since this method is better at detecting the perceived "loudness" of a sound.
Global
When this is activated, the RMS value is calculated over the whole Clip. That is, the overall loudness of entire Clips will be used as a basis for calculating the loudness.
Resolution
This option is only relevant if "Equalize Loudness (RMS)" has been selected and "Global" is deactivated. It is used to set the size of the audio sections that are analysed when calculating the loudness. The loudest section found will be used. The smaller this value, the more sensitive the method will be to peaks in the material.
Normalize Mix (Master Section Input)
If this is activated, the entire Montage mix will be normalized to a preset level at the Master Section input. The maximum level that can be used is 0 dB. Since there is no risk of clipping in the 32 bit internal audio path, you can usually turn off this feature.
Normalize Master Section Output
If this is selected, the entire mix will be normalized to a preset level at the Master Section output. The maximum level that can be used is 0 dB. This function is useful before you mix down or create a CD. Note that this function affects the output of the Master Section, which is "outside" the actual Montage. Therefore, the effect of this function is not saved when you save the Montage.
Exclude Clip Effects
If this is selected, Clip effects will not be taken into account when processing with the Meta Normalizer.
Only Selected Clips
If this is selected, only selected Clips will be processed with the Meta Normalizer.
The Meta Normalizer
The Meta Normalizer, found on the Edit view : Special menu, is a special Montage version of the Batch plug-in processor with the same name that is also included with WaveLab. The basic functionality is similar but instead of processing batched files, it processes clips. The processing is non destructive, i.e. it will not affect the source audio files.
The Meta Normalizer operates in two or three passes. It first analyses the peak or RMS levels on all clips in the Montage. Then it processes the clips according to the highest possible level found amongst the clips, so that they will all play back at equal peak or RMS levels. This is achieved by automatically adjusting the clips "Gain" setting in the clip list. Note that the gain level of a clip can either be amplified or reduced. The two purposes of the Meta Normalizer are to equalize the loudness between all clips (useful e.g. when producing a CD) and to ensure that the full mixdown of the Montage will never clip. Depending on how much the levels differ between clips, and the desired result, there are a number of options available to ensure that the applied processing optimizes the levels without clipping.
The audio path in WaveLab uses 32 Bit floating point processing. You can therefore "overload" it, i.e. use levels above 0 dB, without running the risk of causing digital signal clipping in the signal path. The only section of the audio path that can introduce clipping is the output of the Master Section, and this can also be taken care of by the Meta Normalizer.
The Meta Normalizer dialog
Selecting the Meta Normalizer from the Edit view : Special menu opens a dialog where you can set up various options before applying the processing. The dialog is divided into two pages; "Settings" and "Schedule", which you can switch between by clicking on the appropriate tab at the top of the dialog. In the Settings dialog you specify how the clips will be processed, and in the Schedule dialog you set up options related to the performance of the processing (which always happens in the background).
For descriptions of the parameters, please use the help in the dialog.
When you have set-up the Meta Normalizer dialog, click the "Process" button to activate processing.
Processing happens in the background. You can go on working in WaveLab during the processing, although not in the Montage being processed.
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