First, follow this guide to set your camera up and download CMS5/VMS.
On the main screen, you will want to select the Device Config option.
Select the camera from the left which you want to configure.
Now go to the encode option, you will see the mainstream column and extra stream column with four tick boxes at the bottom.
You will want all four of these boxes to be ticked and then press the apply and ok button.
On the live camera feed, you will see a speaker icon towards the top which you can click on to unmute the sound.
That’s everything setup, you will now be able to get audio on the live video feed from your camera.