Cobalt Digital COMPASS 9033 Input Processing Analog to Digital Video - Manual (Page 73)

9033-OM (V4.0) 9033 PRODUCT MANUAL 3-35
Operating Instructions
9033 Function Submenu List and Descriptions
Audio Mixing
Provides down-mix audio routing selections that
multiplexes any five AES, analog audio, or Dolby
decoder (where equipped) channel sources into a stereo
pair (Down Mix Left and Down Mix Right), or selection of
any two audio sources to be mono-mixed to serve as a
monaural source.
With an optional upmixer licensable feature activated,
any normal PCM stereo pair can be fed to the upmixer to
generate 5.1 surround sound audio which in turn can be
applied to six user-selectable channels.
• Down Mixer Selection Separate drop-down lists for Left, Right, Center, Left Surround (Ls),
and Right Surround (Rs) inputs allow AES channel audio source
selection for each of the five AES inputs.
The example below shows selection from various sources and the
resulting stereo pair DM-L and DM-R. The two signals comprising the pair
can be routed and processed the same as any other audio input source.
Note: The stereo pair consists of basic L/R PCM signals with no
additional encoded information.
• Center Mix Ratio Control Adjusts the attenuation ratio of center-channel content from 5-channel
source that is re-applied as Lt and Rt content to the DM-L and DM-R
stereo mix.
• Minimum attenuation setting (-0.0 dB) applies no ratiometric reduction.
Center channel content is restored as in-phase center-channel content
with no attenuation, making center-channel content more predominate in
the overall mix.
• Maximum attenuation setting (-10.0 dB) applies a -10 dB ratiometric
reduction of center-channel content. Center-channel content is restored
as in-phase center-channel content at a -10 dB ratio relative to overall
level, making center-channel content less predominate in the overall
mix.
(0.0 dB to -10.0 dB range in 0.1 dB steps; default = -3 dB)
Note: Default setting of -3.0 dB is recommended to maintain
center-channel predominance in downmix representative to that of
the original source 5-channel mix.
Table 3-2 9033 Function Submenu List — continued
DM-L
L
R
C
Ls
Rs
DM-R
AESCh 1
AES Ch 2
AES Ch 6
AES Ch 4
AES Ch 5
AES Ch 1 - Ch 16