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channel cluster source of the Loudness measurement. A box on the lower right of
the screen shows the selected Loudness Source, as does the orange bracket on the
Level Meters screen.
Figure 2-14: Loudness Meter Screen
-24
+9
+6
+3
Ref
-3
-6
-9
-12
-15
-18
-21
LU-M
LKFS
LRA
0.1
PROG
-21.5
MAX
-20.1
TP
-20.0
Back
1: Stereo 2.0 #1
Source
Note
:
In order to calculate loudness accurately, it is crucial that you correctly set
the Channel Function for each channel. Depending upon the designated function of
each channel, its signal levels will contribute differently to the Loudness calculation.
Refer to the
Configuration | System Preference | Loudness Configuration
tab
in the Web GUI.
The following data is available on the
Loudness Meter Screen
:
The Program Loudness (shown as -22.5 LKFS in the figure above) is shown digitally
at the upper left of the screen as well as on the meter in the center. At the base of
the meter in the center, one of three indications appears:
1.
LU-M: This means that the Loudness Window is set to Momentary.
2.
LU-S: This means that the Loudness Window is set to Short Term.
3.
LU-C: This means that the Loudness Window is set to Custom. The Loudness
Window is set in the Loudness tab in the Web GUI.
The LU Meter scale colors have the following meaning:
1.
Blue: Loudness is lower than the Reference Level by the Alarm Tolerance.
2.
Green: Loudness is within the Alarm Tolerance.
3.
Orange: Loudness is greater than the Alarm Tolerance.
Below the digital Loudness meter, in the left column, the following parameters are
also displayed:
1.
The Loudness RAnge (LRA) is the measure of variation between the
calculated loudest and softest passage over the program period (shown as
LRA -0.1 above).
2.
The Average Loudness is the average of all calculated loudness
measurements made over the Program period (shown as PROG - 20.5
above).
3.
The Maximum Loudness is the maximum calculated loudness over the
