Grant Covell has already mentioned many Xenakis' recordings. I second his
opinion that

>"Iannis Xenakis: Phlegra, Jalons, Keren, Nomos Alpha", Erato 2292-45770-2


is an important CD. I don't think it's out of print, quite the contrary it
should be easily available.

I also agree that the recordings by the ST-X Ensemble in the mode label are
not particulary good. It's a pity because it's a nice collection, with
interesting pieces like Eonta and Rebonds.

But in the orchestral category, I'd like to add Dammerschein (a umlaut, in
fact). It can be found in mode #53 (Juan Pablo Izquierdo, conductor),
together with Persephassa -a classic for percussion-, La Deesse Athena, and
... Varese's Ameriques. I don't have this CD, I don't even know who plays
Persephassa, but Dammerschein is quite a piece.
By the way, I would say that Metastasis and specially Phitoprakta are
important for more than mere historical reasons.

And one last remark: Grant mentioned that Concret PH was realised for the
Philips Pavilion at the 1958 World Fair in Brussels, where Varese's Poeme
Electronique was also played. The pavilion is always attributed the famous
architect LeCorbusier; it was in fact designed by Xenakis himself (who was
then LeCorbusier's collaborator), following the same structures he had used
for composing Metastasis. That's something LeCorbusier always tried to
conceal and the books fail to say.