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3-32
OPERATION
Sound for Picture Presets
However, if the loudness/density tradeoff is not to your taste, use L
it down, producing lower loudness with less density.
WMA MUSIC: This preset is based on GREGG SLOW but has been edited to mini-
mize artifacts in the Windows Media Audio V9 codec when operated at bitrates be-
low 64 kbps. See Processing for Audio Codecs on page 3-6.
WMA NEWS-TALK: This preset is based on NEWS-TALK but has been edited to min-
imize artifacts in the Windows Media Audio V9 codec when operated at bitrates be-
low 64 kbps.
URBAN: There are two URBAN (Rap) presets: HEAVY and LIGHT. These are similar
to ROCK-MEDIUM and ROCK-OPEN but with a different bass sound. They use the 3-
pole (18 dB/octave) shape on the bass equalizer. URBAN-HEAVY is appropriate for
Urban, Rap, Hip-Hop, Black, R&B, Dance and other similar formats. URBAN-LIGHT is
appropriate for light R&B formats. Highly competitive Urban broadcasters might al-
so use LOUD-HOT+BASS or LOUD+SLAM, modified versions of LOUD-HOT that max-
imize bass punch.
The sound-for-picture presets come in two variants: TVxxxx for digital transmission
channels using no preemphasis and TVAxxxx for analog FM transmission channels
that use 50µs or 75µs preemphasis. Most of these presets have the CBS Loudness
Controller turned on. It is set so that loudness is constrained to a level consistent
with the active D
IALNORM
value is the same as the "target loudness" as measured by an ITU-R BS.1770-2 loud-
ness meter in units of LKFS (ATSC Rec. A/85) and LUFS (EBU Rec. R128). To comply
with these standards, D
in the EU.
To constrain the reading of a BS.1770-2 loudness meter (included with OPTIMOD-PC)
to a fixed threshold, almost all "TV" presets have the BS.1770 T
to 0 LK. However, if your organization does not have a strict policy about processing
for the BS.1770 meter, we recommend that you edit your preferred preset by setting
this control anywhere from +2 to O
a more detailed discussion, see BS.1770 Safety Limiter on page 3-17.
If you wish to use a given preset with the CBS loudness controller turned off, set its
parameter to O
L
T
OUDNESS
HRESH
TV 2B–GEN PURPOSE (TV Two-Band General Purpose): This preset accommodates
most dramatic programming (particularly older material), providing gentle gain con-
trol that limits dynamic range to a level that provides the general audience with
consistently intelligible dialog. It sounds very similar to Orban's analog OPTIMOD-TV
(Model 8182A) when that unit is adjusted for "General" programming according to
the instructions in its operating manual. This preset retains the spectral balance of
its input as much as possible. TV 2B-G
value (see Loudness Control on page 3-14). The D
is customarily set to –24 in the United States and –23
IALNORM
and then saving the result as a User Preset. For
FF
and save the result as a User Preset.
FF
P
EN
URPOSE
ORBAN MODEL 1101
-M
ESS
HRESHOLD
is not the best choice for live news,
to turn
ORE
IALNORM
control set
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