I'm not sure if they still use the same system, but here's a snapshot of how the automated announcements sounded at the Lorraine TGV station in Louvigny back in 2008. Well, I mostly wanted to post this because of the nice chime that they use at the beginning of each announcement—much more pleasant than the buzzes and beeps that most train systems use.
The chimes are also used as part of a jingle for SNCF. Here's a long version of the song that has been used in bits for other corporate videos.
A very top-tier jingle, if you ask me.
I'm slowly poking along on a post about intercity buses in Minnesota. I hope it will turn out to be a good one.