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4.4.3 Audio
This audio function allows you to hear the sound from the camera or transmit your sound to the camera
side. A two-way communication is also possible to be achieved with this feature. Alarm can be triggered
when the audio input is above a certain alarm level you set, and configured audio can be played when an
alarm occurs.
Figure 4-4-16 Audio
Table 4-4-8 Description of the buttons
Parameters Function Introduction
Enable Audio
Check on the checkbox to enable audio feature
Audio Input
Denoise: Set it as On/Off. When you set the function on, the noise detected can
be filtered
Encoding:G711-ULaw, G711-ALaw and AAC LC are available
Sample Rate: There are 8KHz/16KHz two options
Input Gain: Input audio gain level, 0-100
Alarm Level: Alarm will be triggered if voice alarm is enabled and input gained
volume is higher than the alarm level, 1-100
Audio Output
Auto Gain Control: This function is only for H.265 series, improve the quality of
audio
Output Volume: Adjust volume of output
You can upload up to 3 audio files manually to Flash or SD Card on the Audio web page and you can also
edit the audio file’s name when upload.
Figure 4-4-17 Audio File
Note:
1) The Audio mode and Audio Output are only for certain modules.
2) Only support ‘.wav’ audio files with codec type PCM/PCMU/PCMA, 64kbps or 128 kbps and no more than 500k.
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