User Manual

Table Of Contents
WAVELAB
Off-line processing 9 – 203
About the DIRAC processor
The DIRAC engine (DIRAC Time Stretch/Pitch Shift technology, ©2005
Stephan M. Bernsee) is a very high quality pitch shifter, perhaps the best
available on the market today. It will produce the best quality results pos-
sible, but the trade off is longer processing times. In WaveLab, you can
use the DIRAC algorithm to process files with up to 96kHz sample rates,
but not over.
If you check the “Use DIRAC processor” box there will be an extra quality mode
available (“Best (very slow)”) and 6 processing options available on the pop-up
menu.
The selected quality mode affects the processing speed to large extent. Be pre-
pared for very long processing times if the “Best (very slow)” option is used.
About the DIRAC processing options:
Option Description
Auto / Preview This automatically selects the best time/frequency trade off for real-
time/preview performance. This is the fastest setting but might not
provide optimal results in all cases.
Time localization ++
(instruments, voices)
Selects full time localization. This is a good setting for single instru-
ments and solo voices.
Time localization + Time/frequency localization with the emphasis on time localization. If
the previous mode produces echo artefacts, try this option.
Average Time/
Frequency localization
This sets the time/frequency localization halfway between the time
and frequency domains. It is the best setting for all general purpose
signals.
Frequency
localization +
Time/frequency localization with the emphasis on frequency localiza-
tion. Good setting for classical music.
Frequency localization
++ (complex mixes)
Highest possible frequency localization. This setting might not work
well on material with many sharp attack transients, but it can produce
good results with less transient/percussive material.