freak-folk
noun [ U ] music specialized (also freak folk) uk/ˈfriːkˌfəʊk/ us/ˈfriːkˌfoʊk/
怪异民谣（主要使用原声乐器的一种民间音乐，但包括一些不寻常、非常现代的声音和风格）
a type of folk music that uses mainly acoustic (= non-electric) instruments but includes some unusual and very modern sounds and styles