Well tremolo, as I know it from playing guitar, is when I pick pretty much as fast as I can. Its very rapid playing basically, right? But when mixing that in with a slow and steady picking, how could you describe that?

Edit: My music teacher is evil and doesn't speak plain English. Only ridiculously never used musical terms.


Also, this is one of the songs she performed. Any ideas on how to describe it?
http://www.youtube.com/watch?v=S98gx42nAHQ