btw, looking back at my post later the same day I have no idea what I meant by "rigorous and/or weird (and unapologetic in either case)" ???!!!
More coherent generalizations: I tend not to like the solo pieces because a lot of the best things in Xenakis require sufficiently large forces to build a texture with some density to it. When the note-by-note (sound-by-sound) progress of a single instrument is exposed, I think Xenakis' ideas often seem less compelling (i.e. when 20 cellos are gliss'ing in coordinated directions at coordinated rates, followed by statistically scattered pizzicatos, it sounds great, but it doesn't scale down to a solo context very effectively)
― Paul in Santa Cruz (Paul in Santa Cruz), Wednesday, 2 April 2003 00:13 (twenty-three years ago)