User Manual

Table Of Contents
WAVELAB
25 – 626 Analysis
The Loudness tab
This finds loud and weak sections in a more “intelligent” manner than the
Peaks tab. The theory behind this is that there might be a single sample
with a high or low value somewhere, but this may not necessarily mean
that this section is perceived as loud/weak.
To find sections that the ear perceives as significant in volume, you must
look at a longer section of audio. To do this you measure a consecutive
section of samples and then average their value. WaveLab does just this,
using a mathematical method called RMS (Root Mean Square) which is
well known for its accuracy.
Parameters
The parameters on the Loudness tab are slightly more complicated than
those for Peak analysis:
“Resolution” is the length of audio measured and averaged. If this value is lowered,
very short passages of loud/low audio will be detected. When it is raised, the
sound will have to be loud/low for a longer period to result in a hot point.
“Threshold…” is used for recordings where there are pauses, to make sure the
average value is calculated correctly. A pause could “fool” the algorithm. There-
fore you can set up a value, and all audio below that value will be considered si-
lence and will not be taken into account for the average value.
“Maximum number…” and “Minimum time…” are the same as on the Peaks tab,
see above.