Manual

ALC2
Loudness Pilot English Manual (2014-10-07) 92
ALC page
Fig. 44.: ALC page
Loudness section
Target Level parameter
Use the Target level parameter to set the tar-
get level for Loudness adjustment. The unit is
shown as “LFS”, which denotes “LKFS” as well
as “LUFS” (the two are identical).
For normal broadcast, the value should typically
be between -18 and -24 LFS. Note that the dis-
tance between this value and Limit Threshold on
the Limit page is a quality-defining factor – i.e.
the standard headroom of the station. To ensure
decent audio quality, headroom should be 16dB
or higher.
In broadcast environments working with a fixed
Dialnorm value, Target Level can be set 1 to 3dB
higher than the static Dialnorm value in order to
prevent level jumps between channels, and to
have the Dolby DRC system sound better, if in-
voked.
Loudness Unit parameter
LUFS setting
Use this settings to show all parameters in units
of LUFS – that is, in Loudness Units on the ab-
solute scale. This is the normal setting for the
Loudness Unit parameter, which we recommend
for most applications.
LU setting
Use this settings to show all parameters in units
of LU – that is, in Loudness Units on a relative
scale.
Max Reduction parameter
Use the Max Reduction to set the maximum
number of dBs the processor is allowed to at-
tenuate the signal.
If this parameter is set to 0.0dB, level reduction
is disabled regardless of other settings such as
Correction.
Max Boost parameter
Use the Max Boost parameter to set the maxi-
mum number of dBs the processor is allowed
to boost the signal. If this parameter is set to
0.0dB, level boost is disabled regardless of oth-
er settings such as Correction.
Avg. Rate parameter
Use the Avg. Rate parameter to set the speed
by which gain changes as a result of loudness
variations.
The rate adapts to the signal, and it takes the
Slow Window and Pre Process parameter set-
tings into account, so this parameter indicates
an average number.