GUIDE TO INSTALLATION AND OPERATION
26
| FRS-3901
Output Channels: Select the audio channels whose content will be replaced by the output of the downmix processor
•
7&8
•
15&16
•
23&24
•
31&32
•
This selection is not available when the
Operating Mode
is OFF (downmix disabled).
Manual Downmix Config / Default Metadata Config
The heading of this area of the panel changes depending on the selection in the
Operating Mode
pulldown above, but
the available controls are the same in both cases.
•
Operating Mode = Manual – the controls are used to set up the Manual Downmix parameters.
•
Operating Mode = Follow Metadata – the controls are used to set up the default downmix parameters for
situations where there is no metadata available.
Mode:
this pulldown menu selects the downmix mode:
•
LtRt:
Enables the downmix of 5.1 channels into an LtRt (Left total Right total) matrix surround encoded
stereo pair. The input signals on the channel pair selected as the Output Channels are discarded.
•
LoRo: Enables the downmix of 5.1 channels into an LoRo (Left only Right only) stereo pair, which is a
conventional stereo signal. The input signals on the channel pair selected as the Output Channels are
discarded.
Dialnorm:
this pulldown selects the dialog normalization level. Select OFF to prevent the downmix from applying the
dialnorm.
[OFF, -1 dBFS, -2 dBFS, -3 dBFS, ………, -31 dBFS]
Center Mix Level
– sets the center channel downmix level to the selected value
[+3 dB, +1.5dB, 0 dB, -1.5 dB, -3 dB, -4.5 dB, -6 dB, Mute]
Surround Mix Level
– sets the surround channels (Ls & Rs) downmix level to the selected value
[+3 dB, +1.5dB, 0 dB, -1.5 dB, -3 dB, -4.5 dB, -6 dB, Mute]
LFE Mix Level
– sets the LFE channels downmix level to the selected value.
[+10 dB, +9 dB, +7.5, +6 dB, +4.5 dB, +3 dB, +1.5dB, 0 dB, -1.5 dB, -3 dB, -4.5 dB, -6 dB, Mute]
•
Note:
The
LFE Mix Level
pulldown sets the LFE downmix level for both
Manual
and
Follow Metadata
operation
modes, whether or not the metadata is present in the selected path.
The block diagrams below show the configuration of the LtRt surround sound downmixer and the LoRo stereo
downmixer.
Figure 5-16 LtRt Surround Sound Downmixer
+
+
+
+
–
+
+
+
Surround
Level
L
C
R
LFE
Ls
Rs
Lt
Rt
+
+
Center
Level
+
+
LFE
Level
+
+