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四分音符

音乐记谱中,四分音符是一种音符时值。在五线谱记法中,四分音符表示为一个实心的椭圆符头加上一个不带符尾符桿(如右图左边的记号)。当符头位于五线谱第三线上方(包括第三线)时,符桿朝下,否则符桿朝上,符桿改变方向时,符头的方向也要作相应改变(见图)。四分音符的音长是全音符的四分之一,即4/4中的一拍。二分音符的音长是其2倍,八分音符的音长是其二分之一,十六分音符的音长是其四分之一,等等。

从左至右:符干向上、向下的四分音符,以及四分休止符
四個四分音符,四分音符是沒有符尾的最小音符時值

Unicode中,四分音符的编码是U+2669(),或是十進制Alt鍵+9833。

休止符中,对应有着同样音长的是四分休止符,在五线谱中表示为一个类似将“z”和“c”从上至下连起来的记号,写在线谱中央(如右图右边的记号)。

各音符的时值比较

参见

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四分音符
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