You can configure the preference of Audio.
To change the audio channel name of CMS which is seen by the remote host, you can edit Channel Name entry directly. If you check button, only selected camera's audio in Live Monitor is played. If you doesn't check the button, all visible camera's audio are played simultaneously.
It manages sound files used in Audio. You can add a new item by clicking button and remove the item by clicking button. To change the order in the menu, you can move it by clicking / buttons. To specify the sound file, you must click button and select WAV format file. By clicking button, you can test the sound file. Clicking the name of a item makes it become editable state.