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       對(duì)傳統(tǒng)吉他的調(diào)音，一般認(rèn)為使用調(diào)音表調(diào)開放弦音準(zhǔn)能夠得到比較準(zhǔn)確的結(jié)果。但是許多吉他手發(fā)現(xiàn)這樣調(diào)弦后并不能調(diào)準(zhǔn)指板上所有音，即使是在已經(jīng)精確矯正過音準(zhǔn)的吉他上。例如按A和弦時(shí)，構(gòu)造A和弦的幾個(gè)音符間的音程關(guān)系是悅耳的，但是此時(shí)按D和弦就會(huì)發(fā)現(xiàn)音準(zhǔn)有些微偏差，聽感不好。許多吉他手會(huì)對(duì)空弦音做一些細(xì)微的調(diào)整來讓吉他聽起來更順耳一點(diǎn)，但是大多數(shù)人只能把這種缺陷歸結(jié)為吉他的先天不足。Buzz Feiten的矯正調(diào)音系統(tǒng)的基本原理早在17世紀(jì)初對(duì)鋼琴調(diào)音的修正中就有應(yīng)用，實(shí)際操作時(shí)把中央C以上的音調(diào)整的略高一點(diǎn)，同時(shí)把C以下的音調(diào)的略低，這樣可以讓鋼琴聽起來更悅耳。在鋼琴調(diào)音上至少有12種或以上不同方法，并且有各自的命名，怎樣選擇完全取決于演奏者的口味。（注：結(jié)合十二平均律的固有缺陷可以推測(cè)一下為什么說有至少十二種：平均律將純八度音程內(nèi)的音分成均等的十二個(gè)音，這樣以每個(gè)半音為基準(zhǔn)，都可以推出一種接近純律定律的音程排列，新的經(jīng)過細(xì)微調(diào)整的十二個(gè)音實(shí)際上在純律與十二平均律之間做了妥協(xié)，即保持了平均律便于轉(zhuǎn)調(diào)的優(yōu)點(diǎn)，又可以部分解決級(jí)音之間不夠純正的問題；而這十二種方法之外的其他方法是對(duì)它們的再次妥協(xié)。不過只是我的推測(cè)，如有錯(cuò)誤請(qǐng)大家指正~）。在音的修正上，吉他是遠(yuǎn)遠(yuǎn)落后于鋼琴的，很長(zhǎng)時(shí)間以來也一直沒有人在完善吉他結(jié)構(gòu)上想辦法，Buzz Feiten說：“部分原因可能是在歷史上，吉他總是被看作某種玩具或者一件吉普賽人才玩的樂器?！?BR>
       Buzz Feiten的朋友Greg Back在加利福尼亞州立大學(xué)學(xué)習(xí)了一門叫做“音樂物理學(xué)”的課程。這門課程包括了對(duì)古希臘數(shù)學(xué)家畢達(dá)哥拉斯理論的描述，它的理論決定了品絲定位的由來。根據(jù)畢達(dá)哥拉斯的模型，弦的拉力是一定的，由此可以計(jì)算得出品絲安裝在什么位置能購(gòu)得到十二平均律的準(zhǔn)確定律。但是這個(gè)模型顯然忽略了一個(gè)問題，即按下不同品位的弦對(duì)拉力的改變是不同的，例如按下12品音顯然要比按下1品音省力的多。這樣就直接影響了音準(zhǔn)，所以前幾品的音總是略高。Buzz Feiten根據(jù)他的這個(gè)理論作了大量的實(shí)驗(yàn)，形成了一套矯正調(diào)音系統(tǒng)。他把琴枕向一品方向略微移動(dòng)了一點(diǎn)，并對(duì)指板做了其他一些修正。更進(jìn)一步，Buzz Feiten對(duì)不同品數(shù)的電吉他、鋼弦木吉他、尼龍弦木吉他等等都做了相應(yīng)的系統(tǒng)修正。Buzz Feiten為他的研究成果申請(qǐng)了專利。

       對(duì)吉他廠商推廣這種新的修正系統(tǒng)顯然是十分困難的。當(dāng)初Floyd Ross推廣他的浮動(dòng)琴橋的時(shí)候就被許多人排斥，甚至拿他當(dāng)神經(jīng)病看待。而Buzz Feiten要做的是告訴已經(jīng)生產(chǎn)了無數(shù)把吉他的廠家它們以前的所有琴的音準(zhǔn)都有毛病，只有他自己的新系統(tǒng)才是正確的，即使那些大廠家能忍著聽完了Buzz 的說明不把他趕出去，即使他們能夠同意Buzz的理論，他們也不可能不顧面子采用新的修正過的系統(tǒng)，因?yàn)楦緵]辦法跟顧客交待。

       在得到Steve vai，joe satriani，F(xiàn)rank Gambale, Scott Henderson等人的認(rèn)可后，Buzz Feiten系統(tǒng)的推廣有了起色。Tom Anderson牌子的吉他首先把新系統(tǒng)作為了標(biāo)準(zhǔn)，而后著名的Washburn也開始全線推廣這種新系統(tǒng)。


作者：趙洪波 

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