Grass Valley Maestro Master Control v.1.7 User Manual
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Maestro Channel Branding User Guide
143
3rd Step: Audio Sets
Dolby E Support Modes
Choices are:
•
Pass Through (default)
•
External Decode Without Metadata
•
External Decode with Metadata Pass Through
This option allows the user to select how the Maestro product will support
and process Dolby E type signals. Although several options are shown in
this menu, only Pass Through mode is currently supported.
Dolby 5.1 Up-Mix Mode
Choices are:
•
Center Channel Mono Mode (default) (see below)
•
2-Channel Mono Mode (see below)
•
3-Channel Mono Mode (see below)
This option allows the user to determine how Dolby 5.1 audio groups
behave and especially the way in which mono up-mixing behaves. Up-
mixing refers to the operation of taking a signal with fewer channels and
presenting them in a format with many channels. In this case it is how
mono and stereo signals are presented on a 5.1 surround audio group. (By
contrast, down-mixing is many channels to fewer, such as 5.1 mixed down
to stereo.)
Center Channel Mono Mode (default)
This version maps the 5.1 channels normally, but favors the Center Channel
of the group when mono type signals are mapped to a surround group.
The difference between this mode and the others is that when mono signals
are presented, the drill-down selections on the control surface will map
them to the center channel. In addition, when a mono down-mix of sur-
round is selected it also maps the audio to the center channel.
This is done based upon some customer and press information that many
customers that routinely listen to surround sound presentations expect the
primary dialogue to be presented in the center channel. So, for example, if
a mono source, such as an old movie, is presented it is best mapped to the
center channel thus preserving the dialogue sound source customers are
used to. This is in accordance with Dolby recommendations and is the
default.
Two-Channel Mono Mode
This version maps the 5.1 channels normally, but favors the left and right
front channels of the group when mono type signals are mapped to a sur-
round group. The differences between this mode and the others is that
when mono signals are presented, the drill down selections will map them
to both speakers of a stereo pair leaving the center channel silent. In addi-