Lectrosonics SPNTrio, Installation And Setup, Page: 16 / 36

SPN Trio
LECTROSONICS, INC.
16
NOTE: In this example, Mix Bus 7 is used to
create a feed to local monitor speakers (as might
be used in an adjacent control room) powered by
the built-in amplifier in the SPNTrio. The power
amp outputs could just as well be used to power
loudspeakers in the conference room.
Crosspoints in the Local Mixes for room loudspeakers
can be configured using the Phantom Mode as shown
below. In this mode the audio is not actually routed
to the output, but the auto-mixing data from the mic
is applied to the auto-mix bus as if it was. This allows
that microphone to contribute to the mixing activity in
zones where it is not being sent. The result is more
transparent and effective auto-mixing throughout the
entire room.
Matrix tab Mic/Line Inputs tab
Mix Bus selection
Right click on the mix-minus
crosspoints and set the Crosspoint
Mix Mode to Phantom
Far end connections are routed through the matrix to
feed the local loudspeaker system.
Far end receive signals can also be routed in a mix
minus configuration for multi-screen telepresence
systems to direct the audio to the appropriate screens.
Far end connections are routed
through the matrix to feed the
local loudspeakers
The AEC Signal Mix routes the local microphone
signals to the input of the acoustic echo canceller
as shown in the example below. Mix Bus 47 is used
to create these mixes to keep them visually well
separated from the buses used for the Local Mixes.
Matrix tab Mic/Line inputs
Mix bus selection Set the gain on the crosspoints used
to create the AEC Signal Mixes that
will be routed to the AEC input.
Several mixes are needed to establish the signal
routing for conferencing. In this example, all three
far end connections are used to enable multi-site
conferencing. It is suggested that you use Mix Buses
44, 45, 46 for the far end Send Mixes and AEC output,
and Mix Bus 48 for the AEC Reference Mix so that
they are visually well separated from the local PA
mixes.
Matrix tab
Conferencing Inputs tab
Mix bus selection
Send Mixes
AEC Output
AEC Reference Mix