I play the piano so I answered these questions.
If you're wondering what "5 Pieces for David Tudor" and "Evryali" are, here's the details: The 5 Pieces for David Tudor are five piano pieces written for the legendary pianist David Tudor by Sylvano Bussoti, who is known for his strange musical notation representing abstract art. The 4th of these pieces is highly recognized, as it looks; a "cadenza" with it looking like ghuihugyhuihghg and features a bunch of lines and ummm... other things. Yeah other things. All the squiggly lines, random changes from pianissimossimo to pianissimossimossimossimossimo or something, or the fermata'd swirly thing are just challenges that aren't based on accuracy, or on playing a bajillion black keys, but on recognition of what a note is. Evryali, a composition by Iannis Xenakis, has possibly inhumane difficulty, using literally 5 staffs for a section.
