User Manual

WAVELAB
Batch processing 12 – 289
Ultra-pass processors can be freely combined with other types of proces-
sors. For example you can use both the Meta Normalizer and a regular Nor-
malizer in the same batch. You may also combine ultra-pass plug-ins with
multi-pass plug-ins.
An ultra-pass plug-in requires two processing passes. During the first
pass all the files in the batch are analysed, during the second pass, they
are all processed:
This is different from other multi-pass plug-ins, where each file is analy-
sed/processed twice (or even more times if required).
Levels – About the Normalize “Only if clipping” option
Processors often increase signal level. If you are not careful, your file may
be distorted when it exits the batch. To prevent this, you can use the “Only
if clipping” option in the Normalizer. The theory behind this is as follows:
It is perfectly OK if the signal is amplified above “0 dB” (full level) within
the “audio stream”, since WaveLab uses 32 bit internal processing.
There’s lot’s of extra “headroom” and the signal will not be clipped.
However, when a signal that exceeds “0 dB” is converted to a 16 bit file
at the output of the Batch Processor, clipping – and hence distortion –
will occur.
Global Pass 1:
Global Pass 2:
= disk domain = RAM
File 1 Process Analysis
Transfer Process Analysis
Transfer Process Analysis
Transfer Process TransferProcess
Transfer Process TransferProcess
Transfer Process TransferProcess
Read file
Any plug-ins
Meta Normalizer
Read file
Any plug-ins
Meta Normalizer Write file
TransferFile 2
File 3
Transfer
File 1
File 2
File 3