科学音高记号(Scientific pitch notation,SPN)也叫美国标准音高记号(American standard pitch notation,ASPN)或者国际音高记号(International pitch notation,IPN)是一种标记音高的方法,使用音名(A至G)加上一个数字(表明所属八度)来标记音高。在这个系统中,中央C记做C4,钢琴最左边的A记做A0

用科学音高记号表示的十个C


Piano Keyboard
88键钢琴上用数字标出的各个八度组。蓝色的键为中央C,黄色的为A440

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