9-纯八度是什么

纯八度属于音程内容,但因为经常用到,所以这里先讲一点结论。

前面说过,钢琴越往右,音越高,其本质是因为频率变高:

结论:当两个音的振动频率数越接近于简单的整数比时,这两个音听上去就越相近、协和、相似。

这里,记住结论是选择比例1:2,所以两个相邻的C键就是:

如果同时按下这两个音,很难听出有重音,但是如果同时按C和D(比率大概1:1.211),就很明显的听出不和谐。

此时,这两个C,就是纯八度。

那么,如何区分这两个C?

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