MOTU 1248 User Manual page 91

View controls
You can show and hide the FFT display and
spectrogram as desired using the View controls
(Figure 9-5).
Pause button
View menu
Display options
Figure 9-5: FFT view controls.
View menu
This menu provides various options for displaying
the two input channels.
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.
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 9-5), 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.
M O T U A U D I O T O O L S
Axes display
The Axes control (Figure 9-5) 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 9-5) allows you to freeze the
display at any time. To resume, click the button
again.
Horizontal controls (frequency axis)
The Horizontal controls (Figure 9-6) 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 9-6: 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 9-6).
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 9-7) operate similarly
to the Horizontal controls, except that they
configure the y-axis (amplitude).
Horizontal controls menu
91