Tonight’s program focuses on so-called “silent music,” dramatically reductive chamber music that hovers on the edge of audibility. With strong roots in Cageian aesthetics, the principal exponents of this music are the members of the multi-national collective of composer/performer known as the Wandelweiser Group.

Tectonics Festival opens at the First Unitarian church, utilizing their pipe organ in works by Klaus Lang, as well as Feldman performed by James Rushford. Yarn/Wire play works of Lang and Annea Lockwood. Nate Young of Wolf Eyes and Mario Diaz de Leon premiere a newly commissioned collaboration for large ensemble.

A special presentation of Feldman's rarely heard 4 1/2 hour epic, "For Philip Guston", culminates Either/Or's tenth-anniversary festival. This will be a rare performance of a masterwork of 20th century experimentalism, balancing the timbral beauty of this unique ensemble with Feldman's inimitable sense of scale.

Ensemble Sospeso plays Morton Feldman’s three-hour duet for flute and keyboards, For Christian Wolff. An “extended waking dream,” it is generally regarded as the most austere of Feldman’s late works, fantastically quiet, full of pitches and yet somehow never quite emerging from a perpetual state of almost-being.