The activities of the Fringe Festival we only have seen partly "by the side". The main reason for us to go there was the "Military Tattoo".
My wife an me are Scotland-fans, and we like the original "pipes and drums"-music, too.

It's funny, if you are stuck in the traffic, when you start a "pipes-and-drums"-CD in your stereo (by open windows for sure).
The guys besides you, who let some Rap- or House-junk running loudly (or some Turkish stuff), are always very irritated.