[xubuntu-users] Removing applicatons from Volume control indicator

[George F. Nemeyer]

When clicking the speaker indicator in the panel, it opens a pop-up that
has a volume slider and a mute option.

The pop-up also includes a link that opens the full set of audio controls,
as well as application controls for gmusicplayer and VLC player (Neither
of which is actually running).

I want these GONE because the machines are in a public setting, and we do
NOT want people messing with sound settings (other than basic volume) or
launching new programs other than those specifically provided in the
panel.

I've not been able to find any configuration file or info on what controls
there may be for what the pop-up contains.

Since volume can be controlled with the speaker icon alone without the
pop-up open, disabling the whole popup is an acceptable option.

Another option would be to eliminate the speaker indicator entirely and
using the traditional XFCE panel volume control, but that dosen't appear
to be offered anymore.

If anyone has any clues or suggestions, please help.