Cobalt Digital COMPASS 9301 AES Audio Delay - Manual (Page 44)

3
9301 Function Submenu List and Descriptions
3-14 9301 PRODUCT MANUAL 9301-OM (V4.2)
Signal Timing
Provides timing reference selection for the AES
outputs.
• Timing Input Source Selects timing reference from the choices below:
• AES Input: Timing is derived from the lowest-numbered AES input
BNC that is used. (For example, if AES IN 3, AES IN 5, and AES IN 8
are used, AES IN 3 serves as the timing master with AES IN 5 and
AES IN 8 being accordingly re-sampled).
• Reference 1; Reference 2: Timing is derived from either Reference 1
or Reference 2 external frame sync reference signals distributed with
the card frame. Output audio is synchronized to the received black
burst or tri-level video reference.
Note: If Reference 1 or Reference 2 is selected and an appropriate
external reference is not received, the Reference Standard
INVALID message appears in the Card Info status portion of
DashBoard™, indicating invalid frame sync reference error. If
AES Input or Local is being used, this message may still
appear but is of no consequence.
• Local: Timing is derived from the card’s internal clock with no
association with external signals.
Audio Mixing
Provides down-mix audio routing selections that
multiplexes any five AES audio 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.
Table 3-1 9301 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