Syntonic comma

（重定向自Didymic comma）

Just perfect fifth on D Play . The perfect fifth above D (A+) is a syntonic comma higher than the (A♮) that is a just major sixth above C, assuming C and D are 9/8 apart.[1]

In music theory, the syntonic comma, also known as the chromatic diesis, the comma of Didymus, the Ptolemaic comma, or the diatonic comma is a small comma type interval between two musical notes, equal to the frequency ratio 81:80 (around 21.51 cents). Two notes that differ by this interval would sound different from each other even to untrained ears, but would be close enough that they would be more likely interpreted as out-of-tune versions of the same note than as different notes. The comma is referred to as a "comma of Didymus" because it is the amount by which Didymus corrected the Pythagorean major third (81:64, around 407.82 cents) to a just major third (5:4, around 386.31 cents).

单词	Didymic comma
释义	Didymic comma 英语百科 Syntonic comma （重定向自Didymic comma） In music theory, the syntonic comma, also known as the chromatic diesis, the comma of Didymus, the Ptolemaic comma, or the diatonic comma is a small comma type interval between two musical notes, equal to the frequency ratio 81:80 (around 21.51 cents). Two notes that differ by this interval would sound different from each other even to untrained ears, but would be close enough that they would be more likely interpreted as out-of-tune versions of the same note than as different notes. The comma is referred to as a "comma of Didymus" because it is the amount by which Didymus corrected the Pythagorean major third (81:64, around 407.82 cents) to a just major third (5:4, around 386.31 cents).
随便看	Mellau的意思 mellay的意思 mellays的意思 mell的意思 Mellea的意思 mellea armillaria sporophore的意思 mell的意思 mellein的意思 mellem的意思 Mellen的意思 Mellencamp的意思 mellencamps的意思 Mellendorf的意思 Mellensee的意思 Mellenville的意思 melleous的意思 Melle process的意思 meller的意思 Melleretten的意思 Melleril的意思 melleril tablet的意思 Meller lachrymal sac retractor的意思 Meller operation的意思 meller的意思 Mellerud的意思