從藝術角度來看，調音是追尋和諧比例的美，等於肉眼能看見色彩的調和，在藝術家未動筆前的準備。 當調音師坐在鋼琴的面前，開始全神貫注地按下第一個琴鍵，觸鍵的剎那，清楚看到鋼琴裡頭的鎚子快速衝向前，敲打著弦線，震動產生的頻率就是其音高(Pitch)，耳朵一邊聽著這聲音，一邊指揮著手，扭動聯繫在弦線上的調音釘子，透過改變弦線的張力，使這個音返回屬於它的音高。不斷的敲打，不斷作出校正，為鋼琴上每個音定下適當的音高，直到八十八個鍵都完成，而所有的音其實都是建基於十二平均律調音系統，因為這系統能夠完善地為不同的音之間制定共融的關係。 調律(Temperament)來自拉丁字‘Temperare’，意思是「調解、緩和」；法文中的‘tempere’，是指「適當地混合各組成要素」，將對立的事物製造出適合的混合物。[1] 現時調律方式，最為常用的是十二平均律，是將一個八度平均分成十二等份，每等分稱為半音，高八度的音頻率加倍（即二倍頻率）。八度音的頻率分為十二等分，即是分為十二個等比級數，也就是每個音的頻率為前一個音的2的12次方根。比如A440Hz音高，而A#將會是440乘以2的12次方根，即A#466.16Hz，如此類推。 1939年，某國際會議提出，把中央C上方的A定為440Hz。到了1955年，國際標準化組織採用了這個標準，將其訂為ISO 16（1975年，此組織重新確認了這項標準）。從此，A440就成為鋼琴、小提琴以及其他樂器的頻率校準標準。 有時候調音師會被稱為‘鋼琴醫生’，為鋼琴作診治，這大概是種浪漫的說法吧，其實調音技師更像汽車維修員，同樣都是將一台複雜的機器保持其良好的運作，分別只
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