How to Guide
Audio Loudness Monitoring
16
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Elements of Loudness Session Display.
1.
Loudness History:
Shows a graphical display of Loudness measurements over
time. A trend chart is available for durations of 90 or 180 seconds and a bar chart
from 7.5 minutes to 30 hours on the instruments.
2.
Scale:
Indicates the time interval over which the loudness measurements are made.
This can be configured within the Loudness Session menu. When a Bar chart is
selected the top left of the chart shows the duration of each bar and an update icon
shows when the next bar will be added to the chart (Figure 7).
3.
LKFS short
Loudness measurement based on duration of short period.
4.
LKFS inf.
Infinite Loudness measurement based on duration of audio session.
5.
Dialnorm
is the metadata value that is present either within the Dolby data stream
or carried as an Ancillary data packet per SMPTE2020.
6.
True Peak
is the maximum true peak value recorded by the audio meters. More
detailed information on the true peak level of each channel is displayed within the
audio session.
7.
Max Value
The maximum Loudness value recorded within the loudness session.
8.
Min Value
The minimum Loudness value recorded within the loudness session.
9.
Loudness Session Avg.
The Loudness session average that is a summed
average of all the values recorded in the session.
10.
Channel Summation
Shows the summation of audio channels currently used to
compute the Loudness average.
11.
Short Period
Displays the current duration of the short period Loudness average.
12.
Target Value
Displays the current user defined Target Loudness level.
13.
Loudness Session Time
Displays the current duration of the Loudness Session
since last reset.
