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LDP-8242 User Manual (Iss. 03) Introduction • 1–11
Figure 1.4 Downmixing Functional Block Diagram with Example Sources
Flex Mixer
The Flex Mixer is a flexible-structure mixer in which any of 16 summing nodes (
Flex Mix Bus A
thru
Flex Mix Bus P
) can be applied to any of the 16 inputs, thereby allowing several
customizable mixing schemes. Any individual input row can be assigned to any of the Flex Mix
buses.
Using this scheme, full cross-point mixing of PCM signals can be achieved within the limit of
available Flex Mix buses, and eventually applied to any of the internal bus channels.
Figure 1.5
shows an example of two independent 3-to-1 mono mixers availed by setting inputs (rows) 1 thru
3 to use virtual flex mix bus
Flex Mix Bus A
, and by setting inputs 4 thru 6 to use virtual flex mix
bus
Flex Mix Bus B
. The
Flex Mix Bus A
and
Flex Mix Bus B
virtual outputs can then be routed
over any of the internal bus channels. In this example, because rows 1 thru 3 are all applied in
common to mixer node
Flex Mix Bus A
, the
Flex Mix Bus A
output is the mono-mixed sum of
these inputs. The mono mix on the
Flex Mix Bus B
node similarly produces a mono mix of input
rows 4 thru 6.
Figure 1.5 Flex Mixer with Dual Mono Mixer Example
Internal Bus
The internal bus receives its audio inputs from the input routing function and accommodates a
maximum of 16 concurrent channels. This conduit serves as a centralized point for managing
audio delay offset from video and master gain controls for outputs from the input routing
function.