Dedicated Micros SD Advanced Installation And Operation Manual page 36

Audio
The Audio menu allows settings for the bi-directional audio channels to be edited. Audio can be
recorded from camera inputs via input 2. Challenge audio i.e.originating from an Operator using
NetVu ObserVer at a Remote Video Receiving Centre (RVRC) can be recorded via input 1. This
combined audio is then available on Audio Output 1. Refer to 'Installing the SD Advanced for audio
hardware installation information.
Audio Recording
Record Audio Challenge
Use
Audio Sample Rate
Record Gain
Playback Sample Rate
Playback Volume
Record AGC
Record uncompressed
Note: Recording in uncompressed format will significantly increase the disk space used.

Select 'Enable' to activate Audio recording.
Select this option to record an audio challenge originating from an
operator at an RVRC.
Select the intended use of the incoming audio i.e. 'Local
Playback', or 'Challenge'. Select 'Disabled' to deactivate.
Audio can be recorded at 8Hz, 11Hz, 16Hz or 22Hz.
This option allows the Record Gain level to be set. This is the
base setting from which the AGC (Automatic Gain Control) will
operate. Select from 1 to 15. The default and recommended
setting is 15.
Audio can be played back at 8Hz, 11Hz, 16Hz or 22Hz.
Select a volume setting between 1 to 64 for audio playback.
Select this option to activate the AGC function. AGC helps
produce a better quality recording by removing background
noise/distortion.
Select this option to record audio in an uncompressed format.
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