MOTU UltraLite-mk4, Руководство пользователя

Страница: 66 / 94

M O T U A U D I O T O O L S
66
Pausing the display
The Pause button in the upper right corner of the
View section (Figure 9-11) allows you to freeze the
display at any time. To resume, click the button
again. The level meters will remain active while the
display is paused.
Horizontal controls (time axis)
The
Horizontal
controls (Figure 9-12) configure
the value range of the x-axis (time). 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 9-12).
Figure 9-12: Horizontal controls.
In Zoom/Offset mode, Zoom sets the display zoom
from 1/1000x to 10x, where the number represents
the number of pixels per sample. For example,
when the horizontal zoom value is 10x, 10 samples
are displayed in 100 pixels; when the horizontal
zoom value is 1/10x, 100 samples are displayed in
10 pixels.
Pos
moves the line marking time equals
zero left or right.
In Min/Max mode, Min and Max set the earliest
and most recent displayed time.
Time Units
The
Time Units
sub-menu (Figure 9-12) provides
the option to view the X axis in Seconds or
Samples.
Vertical controls (amplitude axis)
The Vertical controls (Figure 9-10) operate
similarly to the Horizontal controls, except that
they configure the y-axis (amplitude).
In Zoom/Offset mode, Zoom sets the display zoom
from 1/2 to 100x, and Pos moves the line marking
amplitude equals zero line up or down.
In
Min/Max
mode,
Min
and
Max
set the smallest
and largest displayed amplitude.
Waveform Recognition
The Waveform Recognition option (Figure 9-10)
searches through new audio data looking for a
waveform which most resembles that which was
previously displayed. The region where this takes
place is a small window around the line marking
time equals zero, denoted by the extra vertical
graph lines surrounding it. There are two kinds of
waveform recognition available: Type I and
Type II.
Type I recognition provides the most stable display
of the waveform. It is the most resistant to change.
Louder transients, such as those produced by a
snare drum, are not displayed inside of the
waveform window. Type I is best for observing the
shape of a signal produced by a synthesizer or
observing the tone of a guitar through a chain of
pedals.
Type II recognition is less resistant to change. It will
include loud transients within the waveform
recognition window. Type II is better for observing
percussive music where the beat itself is to be
centered within the waveform window.
Trigger
When the Trigger (Figure 9-13) is not enabled (the
Trigger menu is set to
None
), the graph updates
based on time: after every
n
samples of the
monitored audio signal, the most recent samples
are displayed. When the Trigger is enabled (set to
any mode other than
None
), the graph updates in
response to specific conditions in the signal. The
Trigger section defines that criteria and how the
graph will display the events that match.
Horizontal controls menu