For the recording configuration on Uniview NVRs, it is advisable to check, directly on the camera, that the Audio is activated and that it can be heard correctly:
This same can also be configured on the recorder, but it is interesting to check that the camera works by itself as indicated above:
Once you have activated the audio in the camera and that it is correctly heard live, you can activate or not its recording, depending on what you want:
Or depending on the version it could be here.
IMPORTANT: If you download the recordings, you must use the Uniview player to be able to listen correctly to the audio of the EzPlayer file