MOTU 828 Mk III Hybrid User Manual page 94

Opening the FFT Analysis window
Choose FFT Analysis from the Devices menu to
open a new window with the filter EQ display for
detailed inspection and adjustment of the EQ filter,
as shown Figure 9-29.
View controls
Figure 9-33: View controls
You can show and hide the FFT display,
spectrogram or EQ band response curves as
desired using the Display Options menu options
(Figure 9-29). These settings are independent of
the small graph display options (Figure 9-10), so
you have the flexibility to display different
combinations in each graph.
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"Show EQ Controls" will be available only if
the focused pair are a stereo input pair or stereo
output pair.
Logarithmic or Linear X-Axis Scale
The x-axis defaults to a logarithmic scale, but can
be changed to a linear scale if desired. In the View
controls (Figure 9-33), 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 9-33) sets the opacity of
the grid displayed in the graph, from 100% (fully
visible) down to 0% (fully hidden).
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Pause button
Display options
Pausing the display
The Pause button in the upper right corner of the
View section (Figure 9-33) allows you to freeze the
display at any time. To resume, click the button
again.
The info box
When any EQ filter point is selected or dragged in
the full window graph, the info box is shown next
to the point in the full graph display (Figure 9-34).
Figure 9-34: The Info Box.
The info box includes the industry standard
scientific note (pitch) name when the control point
is located at a frequency that resides within a
prescribed note range, where C4 is middle C. The
note number is accompanied by the number of
cents (±50) above or below the exact frequency for
the note. If the control point is dragged outside the
note range, only the frequency is shown.
Horizontal controls (frequency axis)
The Horizontal controls (Figure 9-35) 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.
There are two modes for the controls: Zoom/Offset
and Min/Max. To change the mode, use the
Horizontal control menu (Figure 9-35).
Figure 9-35: Horizontal control menu
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