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Audio processing and functions
The default values give good results in most situations, but
you can adjust the settings if you like:
3. Click the Process button.
The spectrum is computed and displayed as a graph.
4. You can adjust the display with the settings in the dis-
play window:
5. If you move the mouse pointer over the graph, a cross-
hair cursor follows the graph curve and the display in the
upper right corner shows the frequency/note and level at
the current position.
To compare the level between two frequencies, move the pointer to one
of the frequencies, right-click once and move the pointer to the second
frequency. The delta value (the difference in level between the current
position and the right-click position) is displayed in the upper right corner
(labeled “D”).
• If you analyze stereo audio and selected the “Stereo” op-
tion in the first dialog, the graphs for the left and right chan-
nel are superimposed in the display, with the left channel
graph in white and the right channel graph in yellow.
The display in the upper right corner shows the values for the left channel
– to see the right channel values, hold down [Shift]. An “L” or “R” is dis
-
played to indicate which channel values are shown.
6. You can leave the window open or close it by clicking
the “Close” button.
If you leave it open and the “Active” checkbox is ticked, the result of the
next Spectrum Analysis will be displayed in the same window.
Option Description
Size in Samples The function divides the audio into “analysis blocks”, the
size of which is set here. The larger this value, the higher
the frequency resolution of the resulting spectrum.
Size of Overlap The overlap between each analysis block.
Window used Allows you to select which window type is used for the
FFT (Fast Fourier Transform, the mathematical method
used for computing the spectrum).
Normalized
Values
When this is activated, the resulting level values are
scaled, so that the highest level is displayed as “1” (0
dB).
From Stereo When analyzing stereo material, there is a pop-up menu
with the following options:
Mono mix – the stereo signal is mixed to mono before
analyzing.
Mono left/right – the left or right channel signal is used
for analysis.
Stereo – both channels are analyzed (two separate
spectrums will be displayed).
Setting Description
dB When this is activated, the vertical axis shows dB values.
When it is deactivated, values between 0 and 1 are shown.
Freq. log When this is activated, frequencies (on the horizontal axis)
are displayed on a logarithmic scale. When it is deactivated,
the frequency axis is linear.
Precision Indicates the frequency resolution of the graph. This value
cannot be changed here, but is governed by the Size in
Samples setting in the previous dialog.
Frequency/
Note
Allows you to select whether you want the frequencies to be
displayed in Hertz or with note names.
Min. Sets the lowest frequency shown in the graph.
Max. Sets the highest frequency shown in the graph. By adjusting
the Min and Max values, you can take a closer look at a
smaller frequency range.
Active When this is activated, the next Spectrum Analysis will appear
in the same window. When deactivated, new Spectrum Anal
-
ysis results will appear in separate windows.
Setting Description