“合唱曲”用英语怎么说？

那位音乐家把这个老曲子配上和音使其成为合唱曲.The musician harmonized the old song for part singing.这些歌唱家已为这些新歌配上和音使其成为合唱曲.The singers began to harmonize the new songs.这是最好的合唱曲.This is choral music of the first water....