Axis Video Server 241SA User Manual page 25

If t the sound input is too low or high, it is possible to adjust the input gain for the
microphone attached to the AXIS 241QA/AXIS 241SA.
Select the desired audio Encoding format, G711, G726.
Depending on the selected encoding, set the desired Bit rate (audio quality). The settings
depend on the available bandwidth and the required audio quality, that is, a high bit rate
setting requires more bandwidth.
Audio Output
If the sound from the speaker is too low or high it is possible to adjust the output gain for
the active speaker attached to the AXIS 241QA/AXIS 241SA.
When satisfied with the settings, click Save, or click Reset to revert to the previously saved
settings.
Advanced Audio Settings
The Audio Quality Settings allow you to tune the audio input to suit your environment.
Enable speech filter improves the sound quality if using a microphone that is placed close
to the person talking and can also help reduce background noise. The filter cuts the lowest
and the highest frequencies. The bypass frequency range is approximately 250Hz to
3700Hz (measured at -10dB cut-off points).
Enable echo cancellation can reduce the feedback generated when using full duplex. If
there is sound distortion, turning echo cancellation off may improve the sound quality.
Noise cancelling is a way of reducing the background noise when there is no useful audio
present. A typical application could be when there is a noisy environment and you are only
interested in hearing the sound when someone is speaking close to a microphone. There are
two adjustable parameters available to optimize this function:
• Noise canceller threshold value
• Noise canceller attenuation
AXIS 241QA/AXIS 241SA - Audio
25