Hi Harpists! I’m working on excerpts from the Widmann Viola Concerto. It is primarily extended techniques, but the explanations are all in German and symbols are different from what I’m used to seeing. I’ve used Google translate and think I’ve figured out how to play most of it, but a few things are still confusing. It’s not always clear whether or not you are supposed to use the tuning key to play a regular glissando or use the metal part to slide up and down against the string. Also, what is a zitter-gliss??? If you have played this piece and can help decipher some of the extended techniques, I would greatly appreciate the help!