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二胡演奏者都有自己较为适应的有效弦长,为此千斤的位置不是随意定的。因为在一般情况下,弦定得太长音就拉不准(特别是小指),而太短又会影响二胡性能的发挥。这一问题虽然重要,对有经验的演奏者则是无关紧要的。青少年或儿童在初学二胡时应该选择什么样的长度?这一问题并不为人们所重视,即使是有经验的辅导教师也只是凭“经验”给学生定弦长,而缺乏理论根据。现介绍一种简单的测算方法,并作简单的律学分析于下。
Erhu players have their own more adapted to the effective chord length, so the location of the jack is not arbitrary. Because under normal circumstances, the strings set too long sound on the pull is not allowed (especially the little finger), and too short will affect the erhu performance. Although this issue is important, it does not matter to experienced performers. What kind of length should teenagers or children choose when they first learn erhu? This problem is not valued by people. Even experienced tutors only give “long-term” experience to their students and lack theoretical evidence. Now introduce a simple calculation method, and make a simple law analysis in the next.