MOTU UltraLite-mk4, Руководство пользователя

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M O T U A U D I O T O O L S
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FFT AND SPECTROGRAM DISPLAY
The FFT analysis pane displays a real-time Fast
Fourier Transform (FFT) frequency measurement
and spectrogram “waterfall”, as shown in
Figure 9-4.
Spectrogram
The spectrogram scrolls from top to bottom, where
the top edge of the display represents what you are
hearing “now”. Color represents amplitude along
the left/right frequency spectrum. The amplitude
color scale runs from black (silence) to red (full
scale) as follows:
Figure 9-5: Spectrogram color-to-amplitude spectrum.
View controls
You can show and hide the FFT display and
spectrogram as desired using the
View controls
(Figure 9-6).
Figure 9-6: FFT view controls.
View menu
This menu provides various options for displaying
the two input channels.
Figure 9-4: FFT and Spectrogram display.
View
controls
Y-axis labels
for FFT display
Horizontal
controls
Vertical
controls
Spectrogram
controls
Grow handle
FFT curve
Black Blue Green Yellow Orange Red
Silence Full scale
View menu setting What it does
Left Displays the left channel only.
Right Displays the right channel only.
Split Screen H Shows both channels side by side, with the
screen split horizontally.
Split Screen V Shows both channels side by side, with the
screen split vertically.
Shared Displays both FFTs (left is green and right is
red), and the spectrogram waterfall shows
the maximum level of either the left or right
channel (whichever is greater).
Max The FFT and spectrogram shows the maxi-
mum level of either the left or right channel.
Subtract L - R Subtracts the right channel from the left
channel and displays the results.
Pause button
Display options
View menu