In the spring, Columbia University hosted a centennial concert for the late Chou Wen-chung, a composer who first won notice as a student of Varèse and later established his own identity through mediations between East and West. His output was not large, yet it exhibited unfailing craftsmanship and unflagging inspiration. On Sunday October the 13th, you can see a webcast of that Columbia concert, with the Continuum ensemble under the direction of Joel Sachs. Featured is the American premiere of a recently rediscovered piece titled In the Mode of Shang.