Polycom VSX 3000 Administrator's Manual page 181

Symptom
When music is played
during the call, it sounds
distorted at the other sites.
Audio is not in stereo.
Problem
The music source is not
connected to the system.
The system's echo
cancellation and noise
suppression features may
interfere with music that the
microphone picks up.
The network is
experiencing packet loss.
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.
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.
The system is configured
for single monitor VGA.
Diagnostics and General Troubleshooting
Corrective action
Connect the music source to the system's audio
input.
Turn off the music.
Retry the call.
Be sure the microphones are set up as described in
Connecting Microphones or a
SoundStation VTX 1000
must be at least 3 ft. (0.9 m) apart and properly
positioned.
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 Placing Speakers to Play Stereo from
Far Sites on page 2-25 and
StereoSurround Settings
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.
Stereo audio is disabled by default on all systems
that support VGA as the main (or single) monitor.
on page 2-17. Microphones
Configuring
on page 4-21.
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