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[Input Volume]
Set the input volume from the microphone connected to the camera when [Audio Input] is set to [Enable].
This is applied when [Audio Server] > [Audio Transmission from the Camera] (P. 136) is set to [Enable].
[Current Volume Level]
When [Audio Input] is set to [Enable], the current volume level is displayed on the status bar.
HM4x H730
[Output Volume]
Enter the output volume from the Viewer to the speaker connected to the camera.
This is applied when [Audio Server] > [Audio Reception from Viewer] (P. 137) is set to [Enable].
H730
[Echo Canceller]
Select to enable or disable the Echo Canceller for suppressing echoes that occur between the microphone and speaker.
This is applied when [Audio Server] (P. 136) is set to the following.
• [Audio Transmission from the Camera] is set to [Enable]
• [Audio Reception from Viewer] is set to [Enable]
H730
Important
Use of the Echo Canceller may affect audio quality and volume. Use it when necessary to suit the installation environment and camera
usage.
[Audio Input Mode]
Select the type of microphone connected to the camera.
If using a microphone, switch [Line In] and [Microphone In] with [Audio Input Mode] to suit the specifications of the
microphone.
Using the wrong input may damage the camera and/or microphone. Be sure to configure settings correctly.
[Audio Communication Method]
Select the audio transmission/reception method.
[Half Duplex]
You can prevent howling that occurs when the microphone and speaker are placed nearby. However, there is no sound
sent from the camera to the viewer while the camera is receiving audio from the viewer or while an audio file is being
played back.
[Full Duplex]
Audio can be transmitted from the camera to the viewer even while the camera is receiving audio from the viewer.

Audio Server

Set audio transmission from the microphone, and audio reception from the Viewer to the camera.
[Audio Transmission from the Camera]
Select [Enable] to transmit audio from the microphone connected to the camera to the Viewer.
[Enable] cannot be selected if [General Audio] > [Audio Input] is set to [Disable].
[Voice Activity Detection]
Select whether to detect when there is no sound coming from the microphone.
136
Caution
HM4x H730
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