Creating Four Digital Array Microphones And A Soundstation Vtx1000 Conferencing System - Polycom SoundStructure C16 Design Manual

Using the Volume Controls
Volume control in the room can be accomplished by adjusting the fader control on the "Amplifier" virtual
channel as follows:
inc fader "Amplifier" 1
will increase the gain on the "Amplifier" channel by 1dB and
dec fader "Amplifier" 1
Alternatively the fader settings may be set to an absolute value with the set command as follows:
set fader "Amplifier" 0
to set the value of the fader to 0dB.
The volume control range can be limited by setting a fader max and fader min as shown in the API syntax
below:
set fader max "Amplifier" 10
set fader min "Amplifier" -10
to limit the maximum and minimum user range of the fader control to +10 and -10dB respectively. The max
and min ranges only need to be set once and can be configured as part of the SoundStructure Studio
configuration file. If the current amplifier fader setting is outside of this range, the range of the maximum or
minimum fader values will be adjusted to include the current fader setting.
In other words, to set a fader max or min value, the current fader value must be within the range of values.
Otherwise the range is extended to include the current fader value.
Creating Four Digital Array Microphones and A
SoundStation VTX1000 Conferencing System
This example creates a typical audio conferencing system with four digital microphone arrays, mono
program audio, a SoundStation VTX1000, and a single audio amplifier zone. In this application the VTX1000
will be the analog telephony interface and can be used to make telephone calls and to control volume in the
local room with the volume adjustment on the VTX1000. The system operates as follows:
● This VTX1000 volume control will adjust the level of the phone line signal that is an input to the
SoundStructure device and increase level in the local room.
● The VTX1000 mute button will mute the audio that is transmitted down the VXT1000's telephone line
so the remote telephony participants won't be able to hear the local participants while muted.
● The VTX1000 must be configured for "Vortex" mode to route the appropriate signals to and from the
Aux In and Aux Out connectors on the VTX1000 power supply.
● The VTX1000's microphones and loudspeaker are not used in this configuration.
Digital microphones are used in this example for ease of installation, however traditional analog
microphones could also be used in the system.
Polycom, Inc. 408