When the Pacifica Quartet came to perform at the Chamber Music Society of Detroit this week, they were specifically asked not to perform the Elliott Carter quartet they had planned. Why? Fear of “alienating” subscribers. “Never mind that Carter’s Fifth (1995) is a brilliant work in the composer’s late style, muscular but communicative, full of spry dialogue and texture. Never mind that the Pacifica’s reputation is based partly on its passionate advocacy of Carter. Never mind that removing Carter to placate a few reactionary patrons drives a stake through the heart of the society’s artistic integrity and tightens the noose more securely around the future of classical music. If you do not play the music of today, to paraphrase composer Gunther Schuller, there will be no masterpieces for tomorrow.”