It's been "ME" (Musikerziehung / Music Education) back then. They had to do it (on most german music universities) that way to sort of trick the system out. BAs back then were only "allowed" for classical music, the only exception being classic and jazz in Hamburg and jazz in Stuttgart (mind you, that was in the early to mid 90s), which allowed for some diploma called "orchestra musician" or something. True BAs were only introduced later on. For me, there was no way I'd go to Stuttgart and Hamburg was pretty classical-heavy, so that wasn't it, either. Hence I went to Hannover and ME has been the only choice (possibly could've moved to Leipzig as well, but Hannover turned out to be a good city for me).
I could've possibly added a real BA degree later on (for an additional year of whatever classes) when they finally introduced it, but I was more into some rock'n'roll life back then, so that was it.
By now, you can even study pop (without any jazz/classic content) for a BA degree over here, but then, the first universities are shutting down their popular music BA facilities already, simply because the future for professionally educated musicians is looking anything but bright (in fact, most folks are studying straight into unemployment). And well, I mean, Germany simply doesn't need 50 top level guitarists (or any other instrument) each and every year. The ones hanging around right now will be sufficient to play all the jobs coming up in the next 20 years.
en.m.wikipedia.org
