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音数.
半音
键盘乐器上,相邻的两个音就构成半音关系。
半音只能指两个音之间的关系,一个音是无法称为半音的。半音分为自然半音和变化半音两种。
- 自然半音就是由相邻的基本音级及它们的变化音级构成的半音,如B—C,E—F,C—D♭,G—A♭,Fx—G#等。
自然半音在音程上称为小二度。
- 变化半音就是某一个基本音级和它自己的变化音级构成的半音,如C—C#,D—D♭,F#—Fx,A♭—A等。
变化半音在音程上称为增一度。
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