文档介绍：阅读理解:
第二十九篇  I’ll Be Bach(2014年新文章)
Composer David Cope is the inventor of puter program that writes original works of classical music. It took Cope 30 years to develop the software. Now most people can’t tell the difference between music by the famous poser J. S. Bach1 (1685-1750) and the Bach-positions from Cope’puter.
It all started in 1980 in the United States, when Cope was trying to write an opera. He was having trouble thinking of new melodies, so be wrote puter program to create the melodies. At first this music was not easy to listen to. What did Cope do? He began to rethink how human pose music. He realized posers1 brains work like big databases. First,they take in all the music that they have ever heard. Then they take out the music that they dislike. Finally, they make new music from what is left. According to Cope,only the posers axe able to create the database accurately,remember it,and form new musical patterns firom it.
Cope built a huge database of existing music. He began with hundreds of works by Bach. 1 he software analyzed the data: it broke it down into smaller pieces and looked for patterns. It bined the pieces into new patterns. Before long, the program pose short Bach-like works. They weren’t good,but it was a start.
Cope knew he had more work to do-he had a whole opera to write. He continued to improve the software. Soon it could analyze plex music. He also added many posers, including his own work,to the database.
A few years later,Cope’puter program,called “Emmy”,was ready to help him with his opera. The process required a lot of collaboration between poser and Emmy. Cope listened to puter’s musical ideas and used the ones that he liked. With Emmy, the opera took only two weeks to finish. It was called Cradle Fallingttind it was a great ess! Cope received some of the best reviews of his career,but no one knew exactly how he posed the work.
Since that first opera, Emmy has written thousands positions. Cope still gives Emmy feed