第二十九篇：I'll Be Bach

　　Composer David Cope is the inventor of a computer 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 German composer J. S. Bach (1685-1750) and the Bach-like compositions from Cope's computer.
　　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 he wrote a computer 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 beings compose music. He realized that composers' 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 great composers are able to create the database accurately, remember it, and form new musical patterns from it.
　　Cope built a huge database of existing music. He began with hundreds of works by Bach. The software analyzed the data: it broke it down into smaller pieces and looked for patterns. It then combined the pieces into new patterns; Before long,the program could compose short Bach-like works. They weren't good, but it was a start.
　　Cope knew he had more work todo-he had a whole opera to write. He continued to improve the software. Soon it could analyze more. complex music. He also added many other composers, including his own work, to the database.,
　　A few years later, Cope's computer program, called "Emmy", was ready to help him with his opera. The process required a lot of collaboration between the composer and Emmy. Cope listened to the computer's musical ideas and used the ones that he liked. With Emmy, the opera took only two weeks to finish. It was called Cradle Falling, and it was a great success! Cope received some of the best reviews of his career, but no one knew exactly how he had composed the work.
　　Since that first opera, Emmy has written thousands of compositions. Cope still gives Emmy feedback on what he likes and doesn't like of her music ,but she is doing most of the hard work of composing these days!
 

　　注释：
　　1．J．S．Bach：约翰•塞巴斯蒂安•巴赫(德语：Johann Sebastian Bach，1685年3月31日--1750年7月28日)，巴洛克时期的德国作曲家，杰出的管风琴、小提琴、大键琴演奏家，同作曲家亨德尔和泰勒曼齐名。巴赫被普遍认为是音乐史上最重要的作曲家之一，并被尊称为“西方‘现代音乐’之父”，也是西方文化史上最重要的人物之一。 
　　练习：
　　l.. The music composed by David cope is about
　　A classical music. 
　　B pop music.
　　C drama. 
　　D country music.
　　2. By developing a computer software, David Cope aimed 
　　A to be like Bach. 
　　B to study Bach.
　　C to write an opera. 
　　D to create a musical database
　　3. What did Cope realize about a great composer's brain?
　　A It forms new musical patterns all by itself. 
　　B It writes a computer program.
　　C It can recognize any music patterns. 
　　D It creates an accurate database.
　　4. Who is Emmy?
　　A a database 
　　B a computer software
　　C a composer who helped David 
　　D an opera
　　5. We can infer from the passage that
　　A David Cope is a computer programmer.
　　B David Cope loves music.
　　C Bach's music helped him a lot.
　　D Emmy did much more work than a composer.