User Manual

WAVELAB
Using samplers and creating loops 28 – 673
Using the auto-find feature
If desired, you can have the program search for good loop points auto-
matically. This is technically no different from adjusting the loop points
yourself, only that the program uses pattern matching algorithms to sug-
gest loop points for you.
Let’s say that you want to let the program find a better start point for the
loop. You first set up a start and end loop marker, to get a basic loop, as
described above. You then invoke the automatic searching, and the pro-
gram searches the waveform from the current start point,
trying to find a
section that is as similar as possible to the area just
after the current end
point. When it finds a match it stops.
You decide how similar the section must be to be considered a match.
Setting up the parameters
The auto-find parameters.
There are two parameters for the auto-find feature, desired correspon-
dence and search accuracy.
• Search accuracy is a parameter for determining how many samples should be in-
cluded in the analysis. Higher values result in greater accuracy, but also longer
processing times.
• Desired correspondence is a value for how well the found section must resemble
the section to which it is compared, to be considered a match. WaveLab uses
two methods for comparison, “phase match” and “join match” (which provide
much better matching than the simple zero crossing detection used by most other
programs. Phase matching also ensures that no harmonic cancellation will occur
when you crossfade, see later in this chapter). First phase matching is performed
and then, to “fine tune”, a join match is employed. A value of 1000 will most likely
fail completely, since it requires a 100% perfect match.