Stereo Settings - TANDBERG F1 D13353.02 User Manual

Note that it is your echo canceller that improves the audio quality experienced by the other
site. When you hear an echo of your own audio it is most likely the far end's echo
canceller that is malfunctioning.
Tips for improving the echo canceller performance:
 Place all microphones as far as possible from the loudspeakers. Minimum
loudspeaker-microphone distance should be 2 meters.
 It is recommended to place the microphones between 1 and 2 meters away from the
persons speaking. By using several microphones, the ratio distance loudspeaker-to-
mic/mic-to-speaker can be increased. Increasing this ratio improves the echo
canceller performance.
 Place the microphones as far as possible from noise sources.
 Reduce the volume setting. Ensure that the loudspeakers do not distort the audio.
 The echo canceller tries to estimate the echo path from the speaker system to the
microphones. Moving objects change this path, therefore try to avoid moving objects.
Be especially aware of large objects and objects placed close to either the
microphone or the speaker system as these objects will cause severe changes to the
echo path.
 Avoid putting paper sheets etc. on the microphone.
 Avoid moving the microphone or loudspeaker.
 In the presence of low frequency noise, enable the noise reduction (NR).

4.5.4 Stereo Settings

Stereo I/O mode
If stereo I/O mode is activated, audio input 5 and 6 and audio output 2 and 3 will behave as a
stereo input/output pair. The VCR Ducking and AGC setting for audio input 6 will in this case
apply to both audio input 5 and 6.
If stereo I/O mode is off, Audio out 2 will be a mix of audio input 6, microphones and the far
end. Audio out 3 will be a mix of audio input 5, microphones and the far end. If stereo I/O
mode is on, Audio out 2 (left stereo channel) will be a mix of the microphones and the far end
left channel. Audio out 3 (right stereo channel) will be a mix of the microphones and the far
end right channel.
Note that you are able to receive stereo through Audio out 1 (S/PDIF) independent of this
setting.
Stereo Speakers
To be able to get stereo sound, the Stereo Speakers has to be connected to the Digital NAM
and stereo speakers has to be enabled in the main audio menu (Stereo Speakers = On).
Stereo sound will be present if you either receive stereo sound from far end or you have
connected a stereo sound source to the audio 5 & 6 input pair and enabled stereo I/O mode.
Note that if Stereo Speakers are enabled in the menu without having any stereo speakers
connected to the Digital NAM, it may cause the acoustic echo-canceller to malfunction.
4 Administrator Settings
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