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__NOTOC__ In music theory, a minor chord () is a chord having a root, a minor third, and a perfect fifth.〔Miller, Michael. (''The Complete Idiot's Guide to Music Theory, 2nd ed'' ), p. 114. (IN ): Alpha, 2005. ISBN 1-59257-437-8.〕 When a chord has these three notes alone, it is called a minor triad. Some minor triads with additional notes, such as the minor seventh chord, may also be called minor chords. A minor triad can also be described as a minor third interval with a major third interval on top or as a root note, a note 3 semitones higher than the root, and a note 7 semitones higher than the root. Hence it can be represented by the integer notation . A major chord () differs from a minor chord in having a major third above the root instead of a minor third. It can also be described as a major third with a minor third on top, in contrast to a minor chord, which has a minor third with a major third on top. They both contain fifths, because a major third (4 semitones) plus a minor third (3 semitones) equals a fifth (7 semitones). A diminished chord is a minor chord with a lowered fifth. An example of a minor chord is the C minor chord, which consists of the notes C (root), E (minor third) and G (perfect fifth): :. The minor chord, along with the major chord, is one of the basic building blocks of tonal music and the common practice period. In Western music, a minor chord, in comparison, "sounds darker than a major chord"〔Kamien, Roger (2008). ''Music: An Appreciation'', 6th Brief Edition, p.46. ISBN 978-0-07-340134-8.〕 but is still considered highly consonant, stable, or as not requiring resolution. == Acoustic consonance of the minor chord == A unique particularity of the minor chord is that this is the only chord of three notes in which the three notes have one harmonic - hearable and with a not too high row - in common (more or less exactly, depending on the tuning system used) : This harmonic, common to the three notes, is situated 2 octaves above the high note of the chord : This is the harmonic of row 6 of the fundamental of the chord, the one of row 5 of middle note, the one of row 4 of the high note: :In the example ''do, mi♭, sol'' : a ''sol'', 2 octaves above. Demonstration : * Minor third = 6/5 = 12/10 * Major third = 5/4 = 15/12 * So the ratios of Minor chord : 10:12:15 * And the explication of the unique harmonic in common, between the three notes, is verified by : 10 *6 = 12 *5 = 15 *4 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Minor chord」の詳細全文を読む スポンサード リンク
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