The Microphone object must be enabled (see the section titled Obiekt typu Mikrofon).

To listen on the Client to sound from the microphone of a camera, left-click to activate the speaker icon in the viewing tile.

Audio from only one camera can be played back at a time

The speaker icon now becomes active and a volume slider appears.

Volume is controlled using the volume adjuster.

The far left position of the adjuster represents the minimum volume, and the far right position represents the maximum volume.

The Axxon Next VMS has an embedded sound booster.

To turn off audio playback, click the speaker icon again.

If a camera has several microphones connected, use the following procedure to select the audio source:

  1. Open the camera's context menu.
  2. Select Sound.

  3. Select the microphone you need.

    The currently selected microphone is marked as On. If you select a 8.0 microphone, the 3,1.0 microphone is set to off, and 8.0 microphone to on.


If a currently specified loudspeaker goes offline, the system automatically switches to another available one.

After the first loudspeaker goes back online, no automatic switching will occur. 

To automatically activate the first loudspeaker in such a case, you have to create a NGP_PORTSOUND_HOSTAPI system variable and set it to DS (see Appendix 10. Creating system variable).