Polycom VSX Series Administrator's Manual page 189

Symptom
Audio is not in stereo.
Stereo audio comes from
the wrong speaker.
© Polycom, Inc.
Problem
Microphones at the
sending site are not placed
correctly.
Speakers at the receiving
site are not placed
correctly.
Speakers at the receiving
site are not connected
correctly.
The receiving site is not set
up for stereo sound.
Stereo is not enabled at
the receiving site.
Echo cancellation is
enabled on the balanced
audio input.
This disables the stereo
feature.
The call speed is too low.
The system only sends
stereo audio in calls placed
at 256 Kbps and higher.
VSX 7000, VSX 8000:
Microphones are
incorrectly identified in the
system.
Speakers are connected
incorrectly.
Chapter 7 - Diagnostics and General Troubleshooting
Corrective action
Be sure the microphones are set up as described in
Connecting Audio Equipment on page
must be at least 3 ft. (0.9 m) apart.
Move the microphones farther apart for clearer stereo
imaging. Small changes in distance can have large effects
on sound reproduction.
Ensure the speakers are about 60° apart as seen from the
middle of the seating area.
Test both speakers using the test on Diagnostics >
Audio > Speaker Test. If you do not hear the 400 Hz tone
from both speakers, check the speaker wires and other
external audio connections.
Advise the people at the receiving site that the sound will
be in stereo only if the system is set up for stereo as
described in Connecting Audio Equipment on page 2-21
and Configuring StereoSurround Settings on page
Check whether stereo is enabled on the Admin Settings
> Audio Settings screen.
If you are not using the audio mixer, clear the Echo
Canceller selection on the second Admin Settings >
Audio Settings screen.
Try the call at a higher speed.
Swap the microphones on the Admin Settings > Audio
Settings screen.
Connect the speaker on the left to the system's white
audio output connector, and the speaker on the right to the
red audio output connector.
2-21. Microphones
4-18.
7 - 25