月琴由琴腔、面板、底板、复手、弦轨、山口等组成。
【一】琴滋是由四块弯凹形木料构成正国形框。一般用老红木做成。在红木上有密槃的针眼细孔的为最好,这种红木。易于发音。其它花梨、紫檀等木料也可以傲。
【二】面板面板和底板是用梧桐木制成,嵌在琴腔的正反两面,构成共鸣箱。决定音色的好坏,面板是坻重要的部分。一般说来,面板要干面松,底板要比面板硬些,这样对来自面板方面的发音能起到回响的作用,以加强共鸣。但也不能太硬,太硬声音发紧。面板直丝纹耍多,不要有节炮,否则弹奏时只有琴弦的震动声,没有面板的共鸣。
【三】弦轴又称轸子,装在琴头的两侧,是用来缠弦、调整音高和固定弦的紧度的。弦轴的原料,般用黄杨木制成。现也有用牛角制或的,牛角质地坚硬有韧性也较美观。一般来说,不耍用太软或太硬的水料来傲弦轴。因为太软或太硬都容易拧不住,影响定音的准确。轴与轴孔的接触要相当严密并转动自如,拧轴时不要过松或过紧,过松容易跑弦;过紧轴的转动不灵活
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