Opening the fft analysis window, View controls, Horizontal controls (frequency axis) – MOTU Track16 - Desktop Studio FireWire/USB 2.0 Interface User Manual

Page 84

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Figure 9-30: FFT display.

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 9-31: Spectrogram color-to-amplitude spectrum.

Opening the FFT Analysis window

Choose

FFT Analysis

from the Devices menu

(Figure 9-26) to open a new window with the filter
EQ display for detailed inspection and adjustment
of the EQ filter, as shown Figure 9-28.

View controls

You can show and hide the FFT display,
spectrogram or EQ band response curves as
desired using the

View

controls

(Figure 9-32).

Figure 9-32: View controls

These settings are independent of the small graph
display options (Figure 9-10 on page 68), so you
have the flexibility to display different
combinations in each graph.

“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 9-32), 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 9-32) 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 9-32) allows you to freeze the
display at any time. To resume, click the button
again.

Horizontal controls (frequency axis)

The

Horizontal

controls (Figure 9-33) 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 9-33).

Figure 9-33: Horizontal control menu

Black

Blue

Green

Yellow

Orange

Red

Silence

Full scale

Pause button

Display options

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