Lectrosonics SPNDNT User Manual download pdf (Page 16)

ASPEN Digital Processor

LECTROSONICS, INC.

System Setup Examples

Basic Conﬁguration

X = INPUT

O = OUTPUT

This example illustrates the basic signal routing be-

tween two ASPEN subsystems connected via a Dante

network. This setup creates a “full-duplex” connection

where each ASPEN subsystem transmits and receives

signals simultaneously as might be used to conduct

conferencing between two meeting rooms. In this ex-

ample, no local sound reinforcement is in use.

The success of this setup could be limited by loud-

speaker/microphone acoustical coupling in the sound

systems in each room. If the level of the sound from

the loudspeakers arriving at each microphone is not far

below the loudness of the talker, an echo will be heard

at the far end (opposite ASPEN system). With careful

placement of loudspeakers and microphones, and the

use of mix-minus zoning, this type of system can be

used.

NOTE: See the next example regarding the use

of the AEC (acoustic echo canceller) on network

connections.

In the ASPEN subsystem on the left, the blue lines

indicate inputs with the signal path starting at the

microphones. The audio is routed to Mix 1 and Mix 2 in

the ASPEN matrix, which are then assigned to Dante

transmit channels 1 and 2 (labeled Out 1 and Out 2) in

the SPNDNT processor.

In the ASPEN subsystem on the right, Dante receive

channels 1 and 2 are assigned to Mix 1 and Mix 2 in

the ASPEN matrix by the SPNDNT processor. These

two mixes are then selected as the signal sources for

outputs 1 and 2 of the mixer.

The reverse of this signal ﬂow (in red) from the ASPEN

system on the right to the system on the left takes

place through ASPEN Mixes 3 and 4, and Dante trans-

mit channels 3 and 4.

Each ASPEN system is an independent sub-system,

so the Mix numbers used in one system have no bear-

ing on those used in any other ASPEN sub-system.

The Mix numbers used here were chosen only for clar-

ity in visualizing the signal paths.

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