Design Guide for the Polycom SoundStructure C16, C12, C8, and SR12
3 - 2
or outputs are used from one design to the next, this requires changing the
control system code programming and spending additional time debugging
and testing the new code to ensure the new device identifications and channel
numbers are used properly. Every change is costly and is error prone, and can
often delay the completion of the installation.
SoundStructure products have taken a different, and simpler, approach to
labeling the inputs and outputs when multiple devices are used together.
SoundStructure products achieve this simplification through the use of phys-
ical channels, virtual channels, and OBAM’s intelligent linking scheme. As
will be shown in the next section, physical channels are the actual input and
outputs numbers for a single device and this numbering is extended sequen-
tially when multiple devices are used. Virtual channels will extend this
concept by creating a layer over physical channels that allows the physical
channels to be referenced by a user defined label, such as “Podium mic”,
rather than as a channel number.
Physical Channels
SoundStructure defines physical channels as a channel that corresponds to the
actual inputs or outputs of the SoundStructure system. Physical channels
include the SoundStructure analog inputs, analog outputs, submixes, the tele-
phony interfaces, the conference link channels, and as will be shown later in
this chapter, even the logic input and output pins.
Examples of physical channels are input 3 which corresponds to the physical
analog input 3 on the rear-panel of a SoundStructure device, input 10 (corre-
sponds to analog input 10), and output 6 which corresponds to the physical
analog output 6 on a SoundStructure device as shown in the following figure.
When designing with SoundStructure products, the analog inputs (such as
microphones, or other audio sources) and outputs from the system (such as
audio sent to amplifiers) will connect to SoundStructure’s physical channels.
Input Physical Channel 3 Input Physical Channel 10
Output Physical Channel 6
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
OUTPUTS INPUTS
SoundStructure C16
TM
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