微分音
フラットより四分音高い:フラットの記号の左右が逆になった記号のみを記す
フラットより四分音低い:フラットの記号の左右が逆になった記号をフラットの左に加える
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Carr, Vanessa. 2008. "These Are Ghost Punks". Vanessa Carr’s website (29 February). (Accessed 2 April 2009)
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