听力原文： In western culture music is regarded as good by birth, and sounds that are welcome are said to be 'music to the ears'. In some other cultures for example, Islamic culture-- it is of low value, associated with sin and evil. In the West and in the high cultures Asia, it is said that there are three types of music. First, classical music, composed and performed by trained professionals originally under the support of courts and religious establishments second, folk music, shared by the population at large and passed on orally and third, popular music, performed by professionals, spread through radio, television, records, films, and print, and consumed by the urban mass public. t universal use of music is as a part of religious ritual. Another less obvious function of music is social adherence. Music also symbolizes military, patriotic and funeral moods and events. In a more general sense, music may express the central social values of a society. In western music, the interrelationship of conductor and orchestra symbolizes the need for strong cooperation among various kinds of specialists in a modern industrial society. (30)