All of the possible alerts, including the custom audio for those that have them, are listed in the SkyView Pilots user guide in chapter 12 (download it from http://docs.dynonavionics.com). The audio files are built into SkyView's software, strictly speaking, but they're enabled by turning on the alert via the EMS setup. When you load the Van's settings, they're effectively turning it on for you automatically.
You should be getting a "Check canopy latch" audio annunciation for the canopy though. You don't hear that?