Understanding Virtual Channel Groups - Polycom SoundStructure C16 Design Manual

Virtual channels are defined by SoundStructure Studio during the project design steps using the vcdef
command described in Appendix A. As an example, a mono virtual channel that is connected to physical
input 8 would be defined as:
vcdef "Podium mic" mono cr_mic_in 8

Understanding Virtual Channel Groups

It is often convenient to be able to refer to a group of virtual channels and control a group of virtual channels
with a single command. Virtual channel groups are used with SoundStructure products to create a single
object made up of loosely associated virtual channels. Once a virtual channel group has been created, all
commands to a virtual channel group affect the virtual channels that are part of the virtual channel group
and command acknowledgments from all the members of the virtual channel group returned. In addition the
virtual channel group returns an acknowledgment that is the value of the acknowledgment of the first
member of the group.
Virtual channel groups are a wrapper around a number of virtual channels, as shown in the following figure.
A Virtual Channel Group
Physical
Channel
As an example of a virtual channel group, consider in the next figure the creation of the virtual channel group
"Mics" made up of the entire collection of individual microphone virtual channels in a room. Once the virtual
channel group "Mics" has been created, it is possible to configure and control all the microphones at the
same time by operating on the "Mics" virtual channel group.
If the group "Mics" is muted with the command:
set mute "Mics" 1
then the acknowledgments returned from the SoundStructure device are:
val mute "Wireless mic" 1
val mute "Table mic 1" 1
val mute "Table mic 2" 1
val mute "Table mic 3" 1
val mute "Table mic 4" 1
val mute "Table mic 5" 1
val mute "Table mic 6" 1
val mute "Table mic 7" 1
val mute "Table mic 8" 1
val mute "Podium mic" 1
val mute "Mics" 1
Polycom, Inc.
Virtual Channel Group
Physical Physical
Channel Channel
Physical
Physical Physical
Channel Channel
Channel
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