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A box on the lower right of the screen shows the selected Loudness Source, as does
the orange bracket on the Level Meters screen.
In order to calculate loudness accurately, it is crucial that you correctly set
Note:
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
program period (shown as MAX -20.1 above).
4. The Maximum True Peak Loudness is the absolute loudest peak waveform
over the program period (shown as TP -20.0 above).
eAMP1-S8-DA
Figure 2-10: Optional Loudness Meter Screen
LKFS
-24
LRA
0.1
PROG
-21.5
MAX
-20.1
TP
-20.0
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LU-M
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