二人转唱腔,是由众多个不同宫调系统的曲牌,相互联缀,从而构成一曲目的唱腔音乐。二人转艺人,大多无文化,无基本的音乐理论知识和严格的听音训练。但演唱起来,曲牌运用却得心应手,多变自如。不同宫调曲牌之间,互相联接转换灵活。是什么方法使他们把这些曲牌贯穿起来,演唱是又不“走调”呢?这就是“扑外弦”。这里,“外弦”即外弦空弦之意。艺人称“敝弦”。 The duo turn aria, is composed of a number of different palace modulation system of the song card, interlinked with each other, which constitutes a track of aria music. Two artists, mostly non-cultural, no basic theory of music theory and rigorous listening training. But singing together, Tunes is handy and versatile. Different Gong tune between the cards, each other flexible conversion. What is the way to make them run through these songs, singing is not “go”? This is “flapping strings.” Here, the “outer string” is the outer string of hollow string meaning. Artist called “cosplay string.”