Grass Valley AMX-3981 2014 - Manual (Page 88)

GUIDE TO INSTALLATION AND OPERATION
82 | AMX-3981
Upmix Mode
The first 2 channels (L & R) are upmixed. The other input channels in PGM 1 are ignored.
AutoMAX-II
TM
Mode
In this mode, the module will automatically detect the presence of 5.1 or 2.0 channels at the input. When 2.0 is
detected, the incoming stereo will be upmixed. When 5.1 is detected, the incoming 5.1 channels will automatically be
passed through untouched.
Follow Metadata mode
This mode is another way to switch between 2.0 stereo and 5.1 and produce a constant 5.1 output. The Coding Mode
parameter in the first program of the Dolby metadata will set the Operating Mode between Pass and Upmix modes.
Note: In Follow Metadata mode, the metadata generator will be automatically turned ON when the upMAX
TM
module is upmixing to provide a valid metadata stream for the upmixed audio content. The generator content
must have been previously configured with valid 5.1 metadata parameters. When the upMAX
TM
module is set
to Pass mode by the incoming metadata stream, the generator will be automatically turned OFF to let the
incoming metadata stream pass through. Refer to Generator Automated mode in the Dolby metadata panel
section for further details.
If the Coding Mode parameter is other than 3/2 (i.e. 5.1 channels) or 2/0 (i.e. stereo channels) or if the selected
metadata path does not carry metadata, the Operating mode will follow the Reversion Mode pull-down.
The Reversion Mode pull-down sets the default Operating Mode to: Pass, Upmix, Last Valid (Last valid Coding
Mode), AutoMAX.
6.5.2 Basic tab
The “Basic” tab is the easiest way to configure the ALC module. You
can use it to load an ALC Preset and specify the output level for each
program.
Of course, all processing controls are accessible and users can
custom design the presets that might be even more appropriate for a
given situation. We strongly recommend starting with the ALC preset
that is closest to the desired objective, then fine tuning it to reach the
desired goal. This will minimize the troubles that will likely be
encountered as many adjustments interact.
ALC Presets
• TV 5B GEN - TeleVision 5-Band GENeral. This is the most
commonly used preset. It provides a moderate degree of dynamic
range processing, and is appropriate for all types of content. It is the
factory default for all core preset choices.
• TV 5B LIGHT - TeleVision 5-Band LIGHT. This is very similar to TV
5B GEN, however the ratio of the multiband compression has been
reduced closer to 2:1 for a more gentle action. Please be aware that
lessening the processing lessens the ability of the unit to control
loudness tightly to a given target.
• TV 5B HVY - TeleVision 5-Band HEAVY. Similar to TV 5B GEN,
however the ratio of the multiband compression has been increased for
a more dense and less dynamic sound.
• TV 5B LOUD - TeleVision 5-Band LOUD. Similar to TV 5B HVY, but louder and more punchy.
Figure 6.10 LA-ALC-DUP - Basic tab