MediaPort 200 • Theory of Operation
9
MediaPort 200 Signal Flow
This section provides a more advanced understanding of the MediaPort signal flow. As
stated, MediaPort fits into multiple conferencing applications, with little or no additional
configuration other than setting proper gain structure and run-time mix level controls.
Matrix Routing
on the next page
is a basic signal flow block diagram showing the MediaPort
default configuration and available processing. Figure 3
below is an audio matrix routing
table that displays MediaPort 200 audio routing. Viewing the mix matrix routing from the
perspective of the outputs:
•
USB Out
•
Set to
Dual Mono
mode (default, stereo available), left and right signals are
summed. The following line inputs are routed to the USB Out L/R:
•
USB Playback
•
HDMI In
•
Line In
•
Mic/Line In is routed to USB Out L/R
NOTE:
USB Communications audio is never routed to USB Out.
•
Line Out
•
Set to
Stereo Mode
(default, dual mono available). Line input L is routed to Line
output L; Line input R is routed to Line output R. The following line inputs are routed
to Line output L/R:
•
USB Playback
•
HDMI In
•
Line In
•
USB Communications – There is an option to mute this signal to the line output
•
Includes both line input signals and USB communications signal (unless USB
communications is muted), which is useful when connected to an external DSP.
NOTE:
Mic/Line input is not routed to Line Out.
•
AEC Ref Out
— Only the USB Communications signal, summed to mono, is routed to
the Ref output.
•
Aux Out
— Only the Mic/Line Input signal is routed to the Aux output.
Matrix Routing Table
USB Out
Line Out
Ref Out
Aux Out
USB Playback
Y/N
*
Y
HDMI
Y
Y
Line In
Y
Y
USB Communications
Y/N
*
Y
Mic/Line In
Y
Y
*Y = Routing with USB Communications set to “Line Out + Ref Out”
N = Routing with USB Communications set to “Ref Out Only”
Figure 3.
MediaPort 200 Matrix Routing Table
figure 3.
MediaPort 200 Matrix Routing Table
