User Manual

Table Of Contents
WAVELAB
9 – 200 Off-line processing
About the DIRAC processor
The DIRAC (DIRAC Time Stretch/Pitch Shift technology, ©2005
Stephan M. Bernsee) engine is a very high quality time stretcher, perhaps
the best available on the market today. It will produce the best quality re-
sults possible, but the trade-off is longer processing times. In WaveLab,
you can use the DIRAC algorithm to process mono or stereo files with up
to 96kHz sample rates.
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.