Copland's music included parts of American folk songs and songs popular during the American Civil War.

VOA: special.2009.06.21

Most of our popular music, folk songs and things like that, are written in duple meter and in a major key.

大多数的流行音乐,民歌,以及类似的音乐,是写在二拍子和大调上面

耶鲁公开课 - 聆听音乐课程节选

Most of our popular music, folk songs and things like that, are written in duple meter and in a major key.

大多数的流行音乐,民歌,以及类似的音乐,是写在二拍子和大调上面

耶鲁公开课 - 聆听音乐课程节选