"On the Off-Beat"
by Conrad Susa
(taken as a exerpt from a larger article)

	...By far the most striking concert was the
second, at which a group of pieces by the young New
York composer Philip Glass were presented. Glass is one 
of a small group (Steve Reich, who also participated
in this concert, is another) who have been making some
extraordinary effects out of music that consists 
largely of drones, into which alien events intrude 
slowly, imperceptibly and compellingly. Thus, for 
example, some of his musicians will hold a drone on a 
small, simple melodic pattern around C major; an 
eternity or so later, someone else will enter with 
something as slightly foreign as a B flat, and it 
almost knocks you out of your seat. (The popular "In C" 
by Terry Riley, which was a huge best-seller among 
young record buyers a couple of years ago, is yet 
another example of this strange, isolater, but 
overwhelming kind of composition.) I am not sure 
exactly where this stuff is going, nor do I need to 
know; but the effect of these extraordinary, slow sonic 
pile-ups in a huge church structure left me somewhat 
stoned, and that's good enough....