Using VLC 0.9.9, under Tools->Preferences->Audio->Filters->spatializer there are 5 parameters/options but no descriptions or names for these parameters/options on the left.
Help->Check for Updates... appears to be broken. I get pop-up window with title "VLC media player updates". Window shows "Launching an update request...", but then comes back with "An error occurred while checking for updates...". Clicking on "Recheck version" button at bottom of pop-up window, repeats this error.