So, my favourite station in Fallout 3 is actually the Vault 101 PA system, but I'm curious where they got the music from, it can't be custom made, since I know for a fact I can hear one of the songs on V101 PA in a Bioshock recording log.

There is a list here http://www.imdb.com/title/tt1073664/soundtrack that has all the songs in FO3.

I searched it up and all I got was 'In the Lamplight Dinner' by DinnerMusic, but I'm not sure if this is it? The Vault 101 music has more than one track right?

Oh, that's interesting. Thank you.

Yes, there's like 4-6 songs.

Edit: After digging around by looking up 'Sound Ideas', the music is actually stock Jazz style music.