The recording industry is at war with its consumers. But “the industry’s efforts are counterproductive. About 60 million people in the United States have already swapped copyrighted material over the Internet, and that number isn’t likely to shrink. The times are a changin’, and record companies should learn to how to profit in this new environment.” A musician who sells his music in the New York subways and makes a good living at it has some tips for the industry.