MOTU 828x 28x30 Audio Interface with ThunderTechnology - Manual (Page 102)

C U E M I X F X
102
X-Y PLOT
The X-Y Plot window (Figure 9-43) graphs the
amplitude of a stereo audio signal on a two-
dimensional grid.
For each unit of time (i.e., each sample), the
amplitude of the left channel is displayed on the x-
axis and the amplitude of the right channel is
displayed on the y-axis. A thick white vertical line
marks where left channel amplitude equals zero; a
thick white horizontal line marks where right
channel amplitude equals zero (Figure 9-43,
below). There are also thick white diagonal lines
for y = x and y = -x.
Metering
Level meters are displayed above and to the right of
the graph for the left (green) and right (red)
channels, respectively. An additional
Correlation
meter (blue) is displayed on the right. This meter
displays the correlation between the two channels.
The higher the meter, the higher the correlation
between the two channels. Below are a few
examples:
Opening the X-Y Plot
Each 828x interface has its own X-Y Plot window.
Choose the
X-Y Plot item from the Devices menu
under the desired interface.
Figure 9-43: X-Y Plot
Situation Meter level X-Y Plot graph Mathematical
relationship
Perfect correla-
tion +1 Diagonal line
going from
lower left to
upper right: y = x
Zero correlation 0 No discern-
ible pattern None
Perfectly out of
phase -1 Diagonal line
going from
upper left to
lower right: y = -x