MOTU 828es, Руководство пользователя

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M O T U A U D I O T O O L S
81
View controls
You can show and hide the FFT display and
spectrogram as desired using the
View controls
(Figure 10-5).
Figure 10-5:
FFT view controls.
View menu
This menu provides various options for displaying
the two input channels.
Logarithmic or Linear X-Axis Scale
The x-axis defaults to a logarithmic scale, but it
can be changed to a linear scale if desired. In the
View controls (Figure 10-5), click
Logarithmic to
access the x-axis scale options menu. With a linear
scale selected, frequency is constant, but the width
of each octave along the x-axis is different. With a
logarithmic scale selected, octaves are displayed
with a constant width, but frequency is displayed
logarithmically within each octave.
Axes display
The Axes control (Figure 10-5) sets the opacity of
the grid displayed in the graph, from 100% (fully
visible) down to 0% (fully hidden).
Pausing the display
The Pause button in the upper right corner of the
View section (Figure 10-5) allows you to freeze the
display at any time. To resume, click the button
again.
Horizontal controls (frequency axis)
The Horizontal controls (Figure 10-6) configure
the value range of the x-axis (frequency). Click
and drag the values up or down to set them, or
double-click to return to the default value.
Figure 10-6: The Horizontal controls.
There are two modes for the controls: Zoom/Offset
and Min/Max . To change the mode, use the
Horizontal control menu (Figure 10-6).
In Zoom/Offset mode, Zoom sets the display zoom
from 1x to 100x, where the number represents the
zoom factor relative to the entire frequency range.
For example, when the horizontal zoom value is
1x, the entire frequency range from 10 to 24000
Hertz is displayed; when the horizontal zoom
value is 2x, one half of the entire frequency range
is displayed.
Pos determines which frequency is
displayed at the center of the graph.
In Min/Max mode, Min and Max set the lowest
and highest displayed frequencies (in Hertz).
Vertical controls (amplitude axis)
The Vertical controls (Figure 10-7) operate
similarly to the Horizontal controls, except that
they configure the y-axis (amplitude).
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
maximum 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
Horizontal controls menu