User Manual

Table Of Contents
WAVELAB
9 – 202 Off-line processing
Length compensation
This allows you to set how the length of the selection should be affected
by the operation.
A setting of 100 means that the length will be the same after the operation.
A setting of 0 means that the program will behave like a tape recorder does when
the speed of its tape is varied. For example, if you raise the pitch by one octave,
the sound will become half as long.
Intermediate values will give results in between these two extremes.
For large transposition values, the lower this setting is, the better the quality of the
effect will be.
Additional settings
Setting Description
Quality There are three Quality settings, “Quick Process”, “Standard” and
“High Quality”. The High Quality mode provides very high quality
pitch correction, but the process will take longer. For most uses, the
Standard mode is probably sufficient. If the DIRAC processor is used
you will get an additional setting; “Best”.
Audio Quantize When this option is activated, the processed file will have the exact
same sample length as the original. When it is deactivated, the result-
ing file length may differ by a few milliseconds.
If you don’t need this length accuracy, you should leave the option
deactivated, for a slightly better audio quality.
Preserve Formants When this option is activated, changing the pitch of vocal material
will give a more realistic result. When you are processing non-vocal
material, you should leave this option deactivated, since it uses a
slightly slower processing algorithm.
Warning: this algorithm might increase the signal level. If your audio
material has a high level, you may need to lower its level before pitch
shifting.
In fact, the best solution is to use this effect from the Batch Proces-
sor, followed by a normalizer.
Rhythm Accuracy This is only available if “Standard” or “High Quality” mode is selected.
Set this parameter according to whether the rhythmic feel of the au-
dio material has a high priority or not. If you set this to a high value,
the timing and rhythmic feel will be preserved as far as possible,
which is important for drum tracks, etc. If you set it to a low value, the
audio quality can be slightly better, but sections of audio might be
moved slightly (in the milliseconds region) in the process.
Use DIRAC processor This is described below.