<Ul> <Li> </Li> <Li> </Li> <Li> </Li> </Ul> <P> American popular music has had a profound effect on music across the world . The country has seen the rise of popular styles that have had a significant influence on global culture, including ragtime, blues, jazz, swing, rock, bluegrass, country, R&B, doo wop, gospel, soul, funk, heavy metal, punk, disco, house, techno, salsa, grunge and hip hop . In addition, the American music industry is quite diverse, supporting a number of regional styles such as zydeco, klezmer and slack - key . </P> <P> Distinctive styles of American popular music emerged early in the 19th century, and in the 20th century the American music industry developed a series of new forms of music, using elements of blues and other genres of American folk music . These popular styles included country, R&B, jazz and rock . The 1960s and 1970s saw a number of important changes in American popular music, including the development of a number of new styles, such as heavy metal, punk, soul, and hip hop . Though these styles were not in the sense of mainstream, they were commercially recorded and are thus examples of popular music as opposed to folk or classical music . </P> <P> The earliest songs that could be considered American popular music, as opposed to the popular music of a particular region or ethnicity, were sentimental parlor songs by Stephen Foster and his peers, and songs meant for use in minstrel shows, theatrical productions that featured singing, dancing and comic performances . Minstrel shows generally used African instruments and dance, and featured performers with their faces blackened, a technique called blackface . By the middle of the 19th century, touring companies had taken this music not only to every part of the United States, but also to the UK, Western Europe, and even to Africa and Asia . Minstrel shows were generally advertised as though the music of the shows was in an African American style, though this was often not true . </P>

How did american popular culture change around the turn of the 20th century