User Manual

WAVELAB
Spectrum Editor 11 – 259
About the Spectrum options
The Spectrum options dialog allows you to define how the frequency
spectrum should be displayed.
• You open the dialog by clicking the arrow button in the lower right corner of
the main view, and selecting “Spectrum options…” from the pop-up menu.
The dialog contains the following items:
Option Description
Style Use this to specify whether the Spectrum should be displayed in color or in
one of two grayscale modes.
Logarithmic
frequency
scale
If this is activated, each octave in the frequency spectrum will be equally
spaced vertically. However, linear mode (i.e. this option is not activated) is
sometimes better suited for spectrograms. The reason for this is that for
sound restoration purposes the “interesting” frequencies are often located in
the upper end of the spectrum, and in linear mode the higher frequencies are
displayed over a larger region.
Range Any frequency below this level will not be displayed in the spectrogram. This
option allows you to focus the display on the more audible part of the spec-
trum.
Audio gain
for analysis
This allows you to apply gain to the analysis (audio is unchanged). This helps
you find artefacts with low levels.
Resolution This selects the size of the frequency analysis (FFT). This analysis calculates
the spectrum from a block of audio samples. The selectable values represent
the number of samples per analysis. The higher the value, the more frequen-
cies can be analyzed, but the analysis will be less accurately localized in the
time domain, and vice versa. Together with the FFT size, the time and fre-
quency resolution is displayed on the menu.