This is the concert program of the Xanthos Ensemble performance on Tuesday, December 2, 2008 at 7:30 p.m., at the Boston University Concert Hall, 855 Commonwealth Avenue, Boston, Massachusetts. Works performed were Okanagon by Giacinto Scelsi, Treize couleurs du soleil couchant by Tristan Murail, Spinoff by Charles Wuroinen, and Eight Songs for a Mad King by Peter Maxwell Davies. Digitization for Boston University Concert Programs was supported by the Boston University Center for the Humanities Library Endowed Fund