Cobalt Digital COMPASS 9305 Embedded Audio Delay Processor - Manual (Page 11)

9305-OM (V4.1) 9305 PRODUCT MANUAL 1-7
Introduction
9305 Functional Description
Audio Routing Description
The audio processor operates as an internal audio router. The router function
chooses from the following inputs:
• 16 channels of embedded audio input
• Four independent internal tone generators (described below)
• Digital silence (mute) setting
• Internal Down Mix and Mono Mixer outputs (described below)
The router function in turn provides 16 channels of embedded audio output on
the SDI post-processed outputs.
The router acts as an audio cross point. Each of the 16 embedded output
channels can receive signal from any one of 16 embedded audio input
channels, four internal tone generators, or several mixer outputs. Unused
output channels can be mapped to a “Silence” source. Each output also
provides gain adjustment and selectable polarity inversion. Output audio rates
are always 48 kHz locked to the selected reference.
As set with the default settings, the routing between embedded input channels
and output channels is basic 1-to-1 (embedded input channel 1 input is routed
to embedded output channel 1, and so on). Other sources (described below)
for each channel are selected using the card edge controls or a remote control
system.
Audio Down Mix and Mono Mix Function
(See Figure 1-2.) The Audio Down Mixer function provides for the selection
of any five embedded audio sources serving as Left (
L ), Right ( R ), Center ( C ),
Left Surround ( Ls ), and Right Surround ( Rs ) individual signals to be
multiplexed into stereo pair Down Mix Left ( DM-L ) and Down Mix Right
( DM-R ). The resulting stereo pair DM-L and DM-R can in turn be routed and
processed just like any of the other audio sources described earlier.
Figure 1-2 Audio Down Mix Functional Block Diagram with Example Sources
DM-L
L
R
C
Ls
Rs
DM-R
Emb Ch 3
Emb Ch 5
Emb Ch 6
Emb Ch 9
Emb Ch 11
Embed Ch 1 - Ch 16