Mode’s third installment of Iannis Xenakis’ music for ensembles offers a variety of combinations, keeping with the sui generis nature of his compositions. This collection features the International Contemporary Ensemble performing five of the works: Palimpsest, Échange, Akanthos, Thalleïn, and O-Mega -and they are joined by avant-garde group red fish blue fish, which performs Zythos. These compositions date from 1977 to 1997, a period dominated by Xenakis’ work with computers and electronic music, though he never lost his connection to live performance and regularly faced the challenges of writing for virtuoso musicians. Except for Thalleïn, which requires the ensemble to play together more or less as a unit, the other selections have prominent solo parts, so there are focal points for the ear, even in the densest textures.