We have a spiffy "Welcome Area" here on reenactor.Net. It will show you how to get around and do some of the things we've found need a little explaining... to visit our Welcome Area, go here: http://www.reenactor.net/new_area/welcome_message.html
Here, we've found some interesting musical selections BASED on Roman music (or what people think it might sound like). Alas, no real notational music has come down throught he ages and so any attempt at Roman music is just a guess. These however are good to listen to.