TC Electronic LM2 Plug-in - Manual (Page 13)

LM6 - Radar Loudness Meter / 13
EN
able to take advantage of the normalization benefits across platforms, at the same
time enabling static meta-data.
Loudness measurements in LM6/LM2 are all rooted in ITU-R BS.1770. However,
subtle differences exist between different regions of the world. Therefore LM6 also
includes the “Loudness Standard” parameter. Be sure to set this parameter correctly
for compliance in your region.
The Program Loudness target is more or less the same for broadcasters around
the world, especially when taking the measurement differences into account. Target
numbers range between -24 and -22 LUFS.
Like with Loudness Range and Loudness Max, the meter should be reset before
measuring Program Loudness.
Sliding Loudn.
Sliding Loudness, unlike Program Loudness, Loudness Range and Loudness Max, is
a continuously updated measure that doesn’t need to be reset. This type of descriptor
is especially useful when “mixing by numbers”, i.e. when there is no access to the
extremely informative radar display. When mixing by numbers, having Program
Loudness as one descriptor and Sliding Loudness as the other displays simultaneous
information about the full program side by side with the most recent loudness history.
Note 1: Because the Sliding Loudness measurement is completely un-gated, it may
also be used to spot check sections of a program complying to “raw” ITU-R BS.1770
and the first revision of ATSC A/85.
Note 2: LM6/LM2 makes use of optimized statistics processing in order to display a
sliding loudness value (a prognosis) as quickly as possible after a reset.
Loudness Max
Loudness Max displays the maximum loudness registered since the meter was
last reset. Loudness Max is an especially useful parameter when checking and
normalizing short duration programs such as promos and commercials. BCAP rules
from the UK is an example of using Loudness Max as an efficient instrument to
reduce listener complaints regarding loud commercials. While Program Loudness is
adequate to normalize a consistent mix, Loudness Max may be used as a second
line of transparent defense against overly short and loud event.
Off
Nothing is displayed.
Sliding Ldn Time
Options: 3 sec, 6 sec , 10 sec , 15 sec 30 sec, 1 min, 2 min, 4 min, 8 min
When Sliding Loudness is selected in Descriptors 1 or 2, this parameter sets the
window for analysis. E.g. if 6 seconds is selected the loudness range for the past 6
seconds is displayed.