ニ (音名)
1. D (musical note)D is a musical note a whole tone above C, and is known as Re within the solfege system. When calculated in equal temperament with a reference of A above middle C as 440 Hz, the frequency of middle D (D4) is approximately 293.665 Hz. See pitch for a discussion of historical variations in frequency.
Read “D (musical note)” on English Wikipedia
Read “ニ (音名)” on Japanese Wikipedia
Read “D (musical note)” on DBpedia
Read “D (musical note)” on English Wikipedia
Read “ニ (音名)” on Japanese Wikipedia
Read “D (musical note)” on DBpedia
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