Voice Tracker™ II INSTRUCTIONS
Included Components
The Voice Tracker II comes with a USB cable (primary
audio connection), one 6 ft audio cable and a 3.5mm
splitter (for the AEC reference connection). A second
audio cable, a USB wall power supply, a DB9 serial
cable, and a ceiling mount are options, which may be
required for certain application configurations.
General Microphone Setup
For simple microphone operation, just connect the Voice
Tracker II array microphone to a computer using the
USB cable. Power for the Voice Tracker II is provided
from the computer through the USB connection. Audio
output is through the USB connection: the PC
’s audio
record setup must be configured to receive USB audio
input from the “Voice Tracker II” connection.
Full Duplex VoIP telephony/conferencing Setup
If the Voice Tracker II is connected to a computer
running a VoIP application like Skype or Adobe Connect,
it will enhance the telephony/conferencing experience by
eliminating acoustic echo. For full duplex operation, a
sample of the far end talker signal must be transmitted to
the Voice Tracker II (for acoustic echo cancellation) by
the audio cable. This signal is obtained by using the
included splitter so part of signal from the speaker out
jack on the PC goes to th
e Voice Tracker’s reference in
jack, and the other part goes to an external speaker.
Make the reference connection to the VT II before the
USB connection so that the USB connect sound turns on
the AEC. Otherwise, AEC may take a few seconds to
engage.
For optimum echo cancellation, the loudspeaker should
be at least 1 Meter from the Voice Tracker.
A view of the connections for full duplex operation is
shown in figure 1.
Figure 1
– Audio and AEC Connections
Setup for Analog output
If the Voice Tracker II is to be connected to devices that
require an analog signal (such as a handheld recorder or
video camera), its output is available in analog format at
mic level or line level through the “Audio Out” 3.5 mm
jack. The included audio cable could be used for this
connection if AEC isn’t used; otherwise, a 2
nd
audio
cable will be required.
The toggle switch on the unit allows selection of mic
level or line level analog output. If the switch is used to
change output levels, the Voice Tracker II must be
rebooted (powered off and then on).
Since the Voice Tracker II is now not connected to a PC,
power needs to be provided by connecting the USB
cable to an optional USB wall power converter.
Position Lights
The green position lights provide feedback on the
operation of the array. They indicate where the array’s
listening beam is pointing. When the array recognizes a
relevant sound, one of the 5 lights will be illuminated.
For example, if a talker is directly in front of the array,
the middle light will be illuminated. If the talker is to one
side, a light on that side will turn on. If the talker moves
across the field of view of the array, the lights will track
the talker’s motion. When two users are sharing the
array, the light will indicate the direction of the active
talker. When there is no active talker, the LEDs will be
off.
Controls
The Voice Tracker II has a pushbutton mute switch.
Press the button once to put the Voice Tracker II into
mute mode. The five green LEDs will blink
(continuously), indicating that the microphone is in mute
mode. Press the button again to return to microphone to
listening mode (the LEDs will indicate the active talker).
MuteButton
DB9
Figure 2
– Mute Button and Connectors
Positioning
The Voice Tracker II scanning listening beam can pick
up sound from a full 360° field of view. However, the
Voice Tracker II is more sensitive to sound in front than
from behind.
