Hey there,
I'm currently working on learning the final movement of the Waldstein; it's coming along quite well, with one lonely exception: the double glissandi near the end of the movement, in the prestissimo section.
Simply put: how on earth do I do these things?

In my many years of playing, this is actually the first piece that has ever called for a glissandi) and the fact that it is a double one is not helping... quick thoughts:
--I believe my hand size is big enough for this; I can easily play 9ths, though 10ths are a little more tricky.
--my fingers just feel like they are being gratted against the keys; it's quite painful, it's not a fast and steady sound, and it's nowhere close to what it needs to be.
I would
really appreciate if someone could provide a step-by-step guide to doing a double glissando: do I hold my hand high or low, how do I position my thumb and fifth finger, how do I get a light and quiet sound, how do I avoid tearing my fingers to pieces?
This is the only part of the piece that's holding me back, and I know it's simply because I have no experience with this technique (and normally I'd ask my teacher, but I won't have a lesson for little awhile, and I'd like to make progress in the meantime)....
Major major thanks in advance
