User Manual

Table Of Contents
WAVELAB
Batch processing 12 – 275
DC Remover –> Denoiser –> Normalizer (first instance) –> Compressor
–> Normalizer (second instance) –> MPEG Compression
Of these effects, the DC Remover and the Normalizer(s) are Multi Pass
effects. This means that the signal needs to pass each of these effects
more than once – in this case twice, first for the effect to analyse the sig-
nal (gathering data for the processing) and then again for the actual pro-
cessing.
This is how WaveLab would handle the processing chain in this example:
During the first “pass”, the audio is read from the file and passed through
the analysis part of the DC Remover. The other processors don’t need to
read the signal at this stage and are skipped. Nothing is written to disk,
the only result of this pass is the amount of DC removal required. After
only a few seconds of analysis (the DC remover does not need to read
the whole file), the process starts over.
During pass two, the DC remover processes the signal, but it is not saved
to disk (which makes the process fast). It also passes through the first
Normalizer for analysis so that the program is aware of how much Normal-
ization will be required. The other processors are skipped.
Pass 1:
= disk domain = RAM
Transfer Analysis
DC Remover
Read file
Pass 2:
= disk domain = RAM
Transfer Process Analysis
Read file DC Remover Normalizer
Pass 3:
Transfer Process AnalysisProcess Process Process
= disk domain = RAM
Read file DC Remover Normalizer
Denoiser
Com-
pressor
Normalizer