[{"data":1,"prerenderedAt":4522},["ShallowReactive",2],{"sidebar-nodes":3,"node-chord":2482,"article-metadata":2861,"related-nodes-degree":2871},[4,58,625,892,1191,1397,1660,2187,2350],{"id":5,"title":6,"body":7,"date":41,"description":42,"domains":43,"draft":45,"extension":46,"lead":47,"meta":48,"navigation":49,"order":50,"path":51,"relatedNotes":50,"relations":50,"seo":52,"stem":53,"tags":54,"titleEn":56,"updated":50,"__hash__":57},"nodes\u002Fnodes\u002Fabout.md","このサイトについて",{"type":8,"value":9,"toc":36},"minimark",[10,19,23,30],[11,12,13,14,18],"p",{},"Ring Rong は、音楽理論を ",[15,16,17],"strong",{},"鳴らしながら確かめる"," サイト。読むだけじゃなく、鍵盤を触って、聴いて、納得する。上達のための練習場ではなくて、「あ、そういうことか」と気づくための場所。",[20,21,22],"h2",{"id":22},"はじめまして",[24,25,27],"say",{"by":26},"リン",[11,28,29],{},"リン。音楽理論？まあ、ちょっと気になるだけ。……いや、ほんとはけっこう知りたい。",[24,31,33],{"by":32},"ロン",[11,34,35],{},"ロンです。音楽の話と、それを誰かに話すのが好き。リンが「なんで？」って言うと、つい鍵盤を出してきちゃう。",{"title":37,"searchDepth":38,"depth":38,"links":39},"",2,[40],{"id":22,"depth":38,"text":22},"2026-05-27","Ring Rong は、音楽理論を 鳴らしながら確かめる サイト。読むだけじゃなく、鍵盤を触って、聴いて、納得する。上達のための練習場ではなくて、「あ、そういうことか」と気づくための場所。",[44],"meta",false,"md","Ring Rong は、音楽理論を鳴らしながら確かめるラボノート。読むだけじゃなく、鍵盤を触って、聴いて、納得する。",{},true,null,"\u002Fnodes\u002Fabout",{"title":6,"description":42},"nodes\u002Fabout",[55],"Info","About","QcvcEh0JLvDsq50e4AilyN2MPs3Ttzww9r7NsaP57Qs",{"id":59,"title":60,"body":61,"date":602,"description":37,"domains":603,"draft":45,"extension":46,"lead":605,"meta":606,"navigation":49,"order":607,"path":608,"relatedNotes":609,"relations":616,"seo":619,"stem":620,"tags":621,"titleEn":623,"updated":50,"__hash__":624},"nodes\u002Fnodes\u002Fchord.md","コードって何？",{"type":8,"value":62,"toc":596},[63,73,82,87,120,125,145,149,154,162,172,209,214,239,248,252,257,266,269,281,285,309,314,345,354,358,363,368,372,383,387,476,481,490,494,499,524,529,538,543,555],[24,64,65],{"by":26},[11,66,67,68,72],{},"ね、コードって結局なんなの？ギターの教本に ",[69,70,71],"note",{},"C"," とか Am とか G7 とかいっぱい書いてあるけど、よくわからない。",[24,74,75],{"by":32},[11,76,77,78,81],{},"あー、コード。一言でいうとね、",[15,79,80],{},"音を同時に鳴らしたもの","、それだけなんだ。",[24,83,84],{"by":26},[11,85,86],{},"それだけ？",[24,88,89,92,99,107],{"by":32},[11,90,91],{},"うん。複数の音を一緒に鳴らすと「和音」になる。和音の英語名が「コード（chord）」なんだ。",[11,93,94,95,98],{},"理屈は単純で、",[15,96,97],{},"どの音を組み合わせるか","にルールがあるから、見慣れない名前が並んでるんだよね。",[100,101],"play-keyboard",{"highlight":102,"label":103,"notes":102,"octaves":104,"start-octave":105,"duration":106},"C4,E4,G4","C メジャー","2","4","1.5",[11,108,109,110,112,113,112,116,119],{},"これが一番基本のコード、シー・メジャーだよ。 ",[69,111,71],{},", ",[69,114,115],{},"E",[69,117,118],{},"G"," の3つを同時に鳴らしてるだけなんだ。",[24,121,122],{"by":26},[11,123,124],{},"3つでコード？2つじゃダメなの？",[24,126,127,134],{"by":32},[11,128,129,130,133],{},"2つでも「2和音」って言うこともあるけど、",[15,131,132],{},"音楽でいう「コード」は基本3つから","なんだ。理由はあとでわかるよ。",[11,135,136,137,140,141,144],{},"3つの音でつくるコードを「",[15,138,139],{},"三和音（さんわおん）","」、英語で ",[15,142,143],{},"triad","（トライアド）って呼ぶんだ。コードの基礎中の基礎、だね。",[20,146,148],{"id":147},"三和音の作り方-3度を積む","三和音の作り方 — 3度を積む",[24,150,151],{"by":26},[11,152,153],{},"で、その3つの音はどう選ぶの？適当に3つ選ぶわけじゃないでしょ？",[24,155,156],{"by":32},[11,157,158,159,81],{},"そう、ルールがあるよ。",[15,160,161],{},"「3度」を2回積む",[24,163,164],{"by":26},[11,165,166,171],{},[167,168,170],"a",{"href":169},"\u002Fdegree\u002F","3度","の話、前にやったやつだ。「音と音の距離を数で数える」やつ。",[24,173,174,177,182,202],{"by":32},[11,175,176],{},"そう。基準の音から3度上、さらにそこから3度上、で3つの音を作るんだ。",[100,178],{"highlight":102,"label":179,"notes":102,"octaves":104,"start-octave":105,"gap":180,"markings":181},"C → E → G","0.4","C4:1,E4:3,G4:5",[11,183,184,186,187,189,190,186,192,194,195,112,197,112,199,201],{},[69,185,71],{}," から3度上が ",[69,188,115],{},"。 ",[69,191,115],{},[69,193,118],{},"。これで ",[69,196,71],{},[69,198,115],{},[69,200,118],{}," の3音、ってわけ。",[11,203,204,205,208],{},"鍵盤の上では、",[15,206,207],{},"白鍵を1つ飛ばしに3つ選ぶ"," だけだよ。だから「3度を積む」って言うんだ。",[24,210,211],{"by":26},[11,212,213],{},"あー、1つ飛ばし。ピアノで弾くときの形そのままだ。",[24,215,216,223,236],{"by":32},[11,217,218,219,222],{},"うん。三和音は、根っこの音（",[15,220,221],{},"ルート","）から数えて：",[224,225,226,230,233],"ul",{},[227,228,229],"li",{},"1番目（ルート）",[227,231,232],{},"3番目（3rd, サード）",[227,234,235],{},"5番目（5th, フィフス）",[11,237,238],{},"がセットなんだ。「1-3-5」って覚え方をする人も多いよ。",[240,241,245],"ticket",{"label":242,"suffix":37,"title":243,"value":244},"Triad","三和音 = 3度を2回積む","1-3-5",[11,246,247],{},"基準音（ルート）から数えて1番目・3番目・5番目の音。白鍵を1つ飛ばしに3つ選ぶだけで三和音が作れる。Western music のコードの基本構造。",[20,249,251],{"id":250},"メジャーとマイナー-真ん中の音で決まる","メジャーとマイナー — 真ん中の音で決まる",[24,253,254],{"by":26},[11,255,256],{},"さっき C コードを「シー・メジャー」って言ってたけど、メジャーとマイナーってどういう違い？",[24,258,259],{"by":32},[11,260,261,262,265],{},"これも構造で説明できるんだよ。",[15,263,264],{},"真ん中の音（3rd）の位置","で決まるんだ。",[100,267],{"highlight":102,"label":103,"notes":102,"octaves":104,"start-octave":105,"duration":106,"black-labels":268},"true",[24,270,271],{"by":32},[11,272,273,274,112,276,112,278,280],{},"こっちが C メジャーだね。 ",[69,275,71],{},[69,277,115],{},[69,279,118],{},"、この3つ。",[100,282],{"highlight":283,"label":284,"notes":283,"octaves":104,"start-octave":105,"duration":106,"black-labels":268},"C4,D#4,G4","C マイナー",[24,286,287,297],{"by":32},[11,288,289,290,112,292,112,295,280],{},"こっちが C マイナーだね。 ",[69,291,71],{},[69,293,294],{},"Eb",[69,296,118],{},[11,298,299,300,302,303,305,306,81],{},"違いは、真ん中の ",[69,301,115],{}," が ",[69,304,294],{}," に ",[15,307,308],{},"半音下がってる",[24,310,311],{"by":26},[11,312,313],{},"え、それだけ？それだけで「明るい」「暗い」が全然違うじゃん。",[24,315,316,319,322,338],{"by":32},[11,317,318],{},"そう、たった半音だよ。でも音楽的にはこの半音が決定的なんだ。",[11,320,321],{},"理屈で言うと：",[224,323,324,331],{},[227,325,326,327,330],{},"メジャー = ルートから3度上が ",[15,328,329],{},"長3度","（半音4個ぶん）",[227,332,333,334,337],{},"マイナー = ルートから3度上が ",[15,335,336],{},"短3度","（半音3個ぶん）",[11,339,340,341,344],{},"長／短は ",[167,342,343],{"href":169},"度"," の話で出てきた「質」の違いだね。たった半音1つで「明るい \u002F 暗い」が変わる、っていうのがコードの面白いところなんだ。",[240,346,351],{"label":347,"suffix":348,"title":349,"value":350},"Quality","次第","明暗は真ん中の音で決まる","3rd",[11,352,353],{},"ルートと5度はメジャー／マイナー共通。違いは真ん中の3度だけ。長3度ならメジャー（明るい）、短3度ならマイナー（暗い）。半音1つの差で逆転する。",[20,355,357],{"id":356},"_5度も動かすとさらに2種類","5度も動かすと、さらに2種類",[24,359,360],{"by":26},[11,361,362],{},"じゃあ5度を動かしてみたらどうなるの？",[24,364,365],{"by":32},[11,366,367],{},"あ、それね！5度も上下できるよ。組み合わせると三和音は4種類になるんだ。",[100,369],{"highlight":370,"label":371,"notes":370,"octaves":104,"start-octave":105,"duration":106,"black-labels":268},"C4,D#4,F#4","C dim",[24,373,374,380],{"by":32},[11,375,376,377,379],{},"これは ",[15,378,371],{},"（シー・ディミニッシュ）だね。短3度＋減5度で、両方狭めたパターンなんだ。すごく不安定で、次の音に進みたくなる響き、っていう感じ。",[11,381,382],{},"逆に両方広げると、こうなる：",[100,384],{"highlight":385,"label":386,"notes":385,"octaves":104,"start-octave":105,"duration":106,"black-labels":268},"C4,E4,G#4","C aug",[24,388,389,394,397,473],{"by":32},[11,390,391,393],{},[15,392,386],{},"（シー・オーグメント、Augmented）だね。長3度＋増5度で、フワッと宙に浮いたような響きなんだ。",[11,395,396],{},"整理すると：",[398,399,400,418],"table",{},[401,402,403],"thead",{},[404,405,406,410,412,415],"tr",{},[407,408,409],"th",{},"コード",[407,411,350],{},[407,413,414],{},"5th",[407,416,417],{},"響き",[419,420,421,435,447,460],"tbody",{},[404,422,423,427,429,432],{},[424,425,426],"td",{},"メジャー",[424,428,329],{},[424,430,431],{},"完全5度",[424,433,434],{},"明るい",[404,436,437,440,442,444],{},[424,438,439],{},"マイナー",[424,441,336],{},[424,443,431],{},[424,445,446],{},"暗い",[404,448,449,452,454,457],{},[424,450,451],{},"dim",[424,453,336],{},[424,455,456],{},"減5度",[424,458,459],{},"不安定",[404,461,462,465,467,470],{},[424,463,464],{},"aug",[424,466,329],{},[424,468,469],{},"増5度",[424,471,472],{},"浮遊感",[11,474,475],{},"たった4種類だよ。",[24,477,478],{"by":26},[11,479,480],{},"へえ、4つしかないんだ。ギターの教本ってもっと無数にあるみたいに見える。",[24,482,483],{"by":32},[11,484,485,486,489],{},"コード名がたくさん見えるのは、",[15,487,488],{},"この4種類に7番目の音（7th）を足したり、別の色付け（sus, add）したり"," して増やしてるからなんだ。基本は4種類だけだよ。",[20,491,493],{"id":492},"なんで3つが単位なのか","なんで「3つ」が単位なのか",[24,495,496],{"by":26},[11,497,498],{},"さっき「2つじゃダメ」って言ってたよね。3つだとどうしてキャラ立つの？",[24,500,501,504,517,521],{"by":32},[11,502,503],{},"ここがコードの本質的なところでね。",[11,505,506,507,510,511,513,514,516],{},"2つの音だと、",[15,508,509],{},"メジャーともマイナーとも決まらない"," んだよ。 ",[69,512,71],{}," と ",[69,515,118],{}," だけ鳴らしても、3度（長 or 短）が入ってないから「明るい・暗い」が決まらないんだ。",[100,518],{"highlight":519,"label":520,"notes":519,"octaves":104,"start-octave":105,"duration":106},"C4,G4","C と G だけ",[11,522,523],{},"3つ目の音（3度）が入って、初めてコードが「キャラ」を持つようになるんだ。だから三和音が基本単位、ってこと。",[24,525,526],{"by":26},[11,527,528],{},"あー、真ん中の音が「明暗の決定権」を持ってるんだ。",[24,530,531],{"by":32},[11,532,533,534,537],{},"そう。",[15,535,536],{},"3度はコードの性格を決める音","なんだ。これだけ覚えておけば、Cmaj7 とか Am7 みたいな複雑そうな名前も、ぜんぶ「ルート + 3rd + 5th + 何か」って構造で見られるようになるよ。",[24,539,540],{"by":26},[11,541,542],{},"意外と単純な作りなんだね、コードって。",[24,544,545,552],{"by":32},[11,546,547,548,551],{},"うん。",[15,549,550],{},"3度を2つ積む、真ん中で性格が決まる","。これがコードの 8 割なんだ。",[11,553,554],{},"下のキーボードの右に「CHORDS \u002F DIATONIC」っていうパネルがあるから、ダイアトニックの I〜vii° を順に触ってみると、雰囲気の違いが体感できると思うよ。",[556,557,558,571,584,590],"qa-grid",{},[559,560,562],"qa-card",{"question":561},"C と Cm の違いって、結局なに？",[11,563,564,565,567,568,570],{},"真ん中の3rd（3番目の音）だけ。C は ",[69,566,115],{},"、Cm は ",[69,569,294],{},"。半音1個ぶんしか違わないけど、明暗が逆。",[559,572,574],{"question":573},"ギターやピアノで C コードを弾くとき、3音だけなの？",[11,575,576,577,112,579,112,581,583],{},"「鳴ってる音の種類」は3音。でも実際にはオクターブ違いで重複して鳴らすことが多い。例えば C を弦4本で「C・E・G・C」と弾くと音は4つあるけど、種類は ",[69,578,71],{},[69,580,115],{},[69,582,118],{}," の3つだけ。",[559,585,587],{"question":586},"ダイアトニックって何？",[11,588,589],{},"キー（調）の中で自然に出てくる7つのコードのこと。C メジャーキーなら C・Dm・Em・F・G・Am・B°。下のキーボードの右にあるパッドで触れるよ。",[559,591,593],{"question":592},"3度を3つ4つ積んだら？",[11,594,595],{},"4音目（7th）を積むと、Cmaj7 とか C7 みたいな「セブンス・コード」になる。5音目以降を積むのも普通にあって、9th・11th・13th とか。重ねるほど色が複雑になる。",{"title":37,"searchDepth":38,"depth":38,"links":597},[598,599,600,601],{"id":147,"depth":38,"text":148},{"id":250,"depth":38,"text":251},{"id":356,"depth":38,"text":357},{"id":492,"depth":38,"text":493},"2026-05-31",[604],"入門","音を3つ重ねたものがコード。鍵盤の上で「3度を2回積む」という単純なルールから、メジャーもマイナーも全部生まれる。",{},4,"\u002Fnodes\u002Fchord",[610,613],{"to":611,"by":32,"text":612},"degree","コードは「3度を2回積む」だけで作れる。度の話がそのまま下地になる。",{"to":614,"by":26,"text":615},"enharmonic","メジャーとマイナーは「真ん中の音が半音下がるかどうか」。黒鍵の話とも繋がる。",{"prerequisite":617,"extends":618},[611],[],{"title":60,"description":37},"nodes\u002Fchord",[622,604],"Theory","Chords","eWGy8yjpmjiA59AKrWyHHPD3j8f1cY9PL9QY5IR0-T8",{"id":626,"title":627,"body":628,"date":865,"description":37,"domains":866,"draft":45,"extension":46,"lead":867,"meta":868,"navigation":49,"order":869,"path":870,"relatedNotes":871,"relations":883,"seo":887,"stem":888,"tags":889,"titleEn":890,"updated":50,"__hash__":891},"nodes\u002Fnodes\u002Fdegree.md","度って何？",{"type":8,"value":629,"toc":861},[630,635,676,681,684,694,715,726,734,739,748,752,763,778,783,797,802,809,814,822],[24,631,632],{"by":26},[11,633,634],{},"ね、ロン。「3度ハモる」とか「5度跳ぶ」とか聞くんだけど、度って何？",[24,636,637,649,658,666],{"by":32},[11,638,639,640,644,645,648],{},"あ、それね！度っていうのは、",[167,641,643],{"href":642},"\u002Finterval\u002F","音と音のあいだ","を ",[15,646,647],{},"音の数"," で数える単位なんだ。",[11,650,651,652,654,655,657],{},"たとえば ",[69,653,71],{}," から ",[69,656,115],{}," まで。",[100,659],{"highlight":660,"label":661,"notes":662,"octaves":663,"start-octave":105,"gap":664,"markings":665},"C4,E4","C → D → E","C4,D4,E4","1","0.3","C4:1,D4:2,E4:3",[11,667,668,513,670,513,673,675],{},[69,669,71],{},[69,671,672],{},"D",[69,674,115],{}," で3つぶん、あるよね。だから「3度」って呼ぶんだ。",[24,677,678],{"by":26},[11,679,680],{},"ふーん、数で言うのか。",[20,682,683],{"id":683},"始点も含めて数える",[24,685,686],{"by":26},[11,687,688,689,654,691,693],{},"ちょっと待って。じゃあ ",[69,690,71],{},[69,692,672],{}," までは？ 1個しか飛んでないから……1度？",[24,695,696,703,710],{"by":32},[11,697,698,699,702],{},"あ、そこは違くて、",[15,700,701],{},"始点も含めて"," 数えるんだよ。",[11,704,705,513,707,709],{},[69,706,71],{},[69,708,672],{}," で2つあるから、2度なんだ。",[100,711],{"highlight":712,"label":713,"notes":712,"octaves":663,"start-octave":105,"gap":664,"markings":714},"C4,D4","C → D","C4:1,D4:2",[24,716,717],{"by":26},[11,718,719,720,654,722,725],{},"え、じゃあ ",[69,721,71],{},[69,723,724],{},"C5"," は……1度になる？",[24,727,728,731],{"by":32},[11,729,730],{},"うん、1度だよ。同じ音同士でも「0度」じゃなくて1度って数える。",[11,732,733],{},"ちょっと不思議だけど、これが度の数え方なんだ。",[24,735,736],{"by":26},[11,737,738],{},"へえ、何個ぶん「離れた」じゃなくて、「○個目」って数える感じか。",[240,740,745],{"label":741,"suffix":742,"title":743,"value":744},"Rule","個","度 = 音の数（始点込み）","始点+",[11,746,747],{},"C→E は3度（C, D, E で3つ）、C→G は5度（C, D, E, F, G で5つ）。同じ音同士でも1度（始点だけで1つ）。",[20,749,751],{"id":750},"数だけだと実はちょっとざっくり","数だけだと、実はちょっとざっくり",[24,753,754],{"by":26},[11,755,756,757,759,760,762],{},"じゃあ「3度ハモる」って、たとえば ",[69,758,71],{}," なら ",[69,761,115],{}," と一緒に鳴らせばいいの？",[24,764,765,768,771,775],{"by":32},[11,766,767],{},"基本はそう。でも実は、同じ「3度」のなかにも、響きが2つあるんだよね。",[100,769],{"highlight":660,"label":770,"notes":660,"octaves":663,"start-octave":105,"duration":106},"C と E",[100,772],{"highlight":773,"label":774,"notes":773,"octaves":663,"start-octave":105,"duration":106},"C4,D#4","C と E♭",[11,776,777],{},"どっちも文字で数えれば C, D, E の3つで「3度」になる。でも半音1つぶん、後ろのほうが近いんだ。",[24,779,780],{"by":26},[11,781,782],{},"あー、後ろのほう、ちょっと暗い感じ。",[24,784,785,794],{"by":32},[11,786,787,788,790,791,793],{},"そう、それ！前者を ",[15,789,329],{},"、後者を ",[15,792,336],{}," って呼ぶよ。",[11,795,796],{},"数で大きい枠（3度）を、質（長／短）で中の細かさを表してる感じなんだ。",[24,798,799],{"by":26},[11,800,801],{},"じゃあ「5度」とかも、いろんな5度があるってこと？",[24,803,804],{"by":32},[11,805,547,806,808],{},[15,807,431],{},"、減5度、増5度、ってあるよ。ふつう「5度」って言うときは完全5度を指すことが多いけどね。",[24,810,811],{"by":26},[11,812,813],{},"そっか、5度って実は1種類じゃないのか。",[240,815,819],{"label":347,"suffix":816,"title":817,"value":818},"半音","長 ⇄ 短 = 半音1つ","+1",[11,820,821],{},"同じ「3度」でも、長3度と短3度は半音1つぶん違う。数（度）で大きい枠を、質（長／短／完全）で半音単位の細かさを表す。",[556,823,824,830,844,855],{},[559,825,827],{"question":826},"長・短・完全って、どう違うの？",[11,828,829],{},"音程の「質」の呼び方だよ。1度・4度・5度・8度には「完全」が、2度・3度・6度・7度には「長／短」が付く。同じ数でも質で半音1つぶん変わる。",[559,831,833],{"question":832},"数えるとき、黒鍵は？",[11,834,835,836,843],{},"度は ",[15,837,838,842],{},[167,839,841],{"href":840},"\u002Fnote-name\u002F","音名","の文字（C, D, E, ...）"," で数えるよ。だから C と E♭ も、文字としては C, D, E の3つで「3度」。半音の数は質（長／短）のほうで区別する。",[559,845,847],{"question":846},"黒鍵から数えるときは？",[11,848,849,850,854],{},"「F#」と呼ぶか「G♭」と呼ぶかで数える文字が変わるよ。F# → A は F, G, A で3度、G♭ → B♭ は G, A, B で3度。物理的には同じ鍵盤でも、音名で書き分ける。",[167,851,853],{"href":852},"\u002Fenharmonic\u002F","黒鍵から度を数える"," の記事で詳しく扱ってる。",[559,856,858],{"question":857},"8度ってあるの？",[11,859,860],{},"あるよ。1オクターブ上の同名音（C→C）は8度。完全8度って呼ぶ。",{"title":37,"searchDepth":38,"depth":38,"links":862},[863,864],{"id":683,"depth":38,"text":683},{"id":750,"depth":38,"text":751},"2026-05-29",[604],"「3度ハモる」「5度跳ぶ」の「度」。音と音のあいだを、音の数で数える単位。始点も含めるのがポイント。",{},3,"\u002Fnodes\u002Fdegree",[872,875,877,880],{"to":873,"by":32,"text":874},"chord","度を「2回積む」とコードになる。応用編はこっち。鍵盤を弾きながら確かめると速い。",{"to":614,"by":32,"text":876},"数え方の基本を読んだら、黒鍵の名前の話に進むと、もう一段ロジックが見える。",{"to":878,"by":32,"text":879},"note-name","度は「音名で数える」のがミソだから、音名の記事を押さえておくと楽だよ。",{"to":881,"by":26,"text":882},"interval","度って数え方の話だけど、「音と音の距離」は音程と一緒。先に音程を読んでおくとつながりやすい。",{"prerequisite":884,"extends":885},[878],[881,614,873,886],"scale",{"title":627,"description":37},"nodes\u002Fdegree",[622,604],"Degree","dzGr_ULpUWootpsEyME3E2mVLcTXVWSj0zD0PXLls5A",{"id":893,"title":853,"body":894,"date":865,"description":37,"domains":1174,"draft":45,"extension":46,"lead":1176,"meta":1177,"navigation":49,"order":1178,"path":1179,"relatedNotes":1180,"relations":1183,"seo":1186,"stem":1187,"tags":1188,"titleEn":1189,"updated":50,"__hash__":1190},"nodes\u002Fnodes\u002Fenharmonic.md",{"type":8,"value":895,"toc":1169},[896,901,909,914,927,932,936,961,966,970,975,1000,1010,1022,1027,1036,1040,1056,1067,1072,1099,1104,1116,1121,1130,1135,1144,1149],[24,897,898],{"by":26},[11,899,900],{},"ね、前に「黒鍵から数えるときは F♯ か G♭ かで違う」って言ってたよね。同じ鍵盤なのに、なんで両方つかうの？",[24,902,903,906],{"by":32},[11,904,905],{},"あ、それね！同じ場所の鍵盤でも、文脈によって名前が違うんだ。",[11,907,908],{},"そして名前が違うと、数え方も変わるんだよ。",[24,910,911],{"by":26},[11,912,913],{},"名前が変わると……数え方も？",[24,915,916],{"by":32},[11,917,547,918,920,921,926],{},[167,919,343],{"href":169},"は ",[15,922,923,925],{},[167,924,841],{"href":840},"（C, D, E, ...）の文字"," で数えるから、F♯ から始めるか G♭ から始めるかで、出てくる文字が違うんだよね。",[24,928,929],{"by":26},[11,930,931],{},"ちょっと、実際にやってみたい。",[20,933,935],{"id":934},"f-から数えると","F♯ から数えると",[24,937,938,941,947],{"by":32},[11,939,940],{},"じゃあ F♯ から 3度上を数えてみよう。",[100,942],{"black-labels":268,"highlight":943,"label":944,"notes":945,"octaves":663,"start-octave":105,"gap":664,"markings":946},"F#4,A4","F♯ → G → A","F#4,G4,A4","F#4:1,G4:2,A4:3",[11,948,949,112,952,112,954,957,958,960],{},[69,950,951],{},"F#",[69,953,118],{},[69,955,956],{},"A"," の3つで3度だね。 答えは ",[69,959,956],{},"。",[24,962,963],{"by":26},[11,964,965],{},"うん、シンプル。F の次が G、その次が A だから。",[20,967,969],{"id":968},"同じ場所g-から数えると","同じ場所、G♭ から数えると",[24,971,972],{"by":26},[11,973,974],{},"じゃあ G♭ から数えるとどうなるの？同じ鍵盤じゃないの？",[24,976,977,980,986],{"by":32},[11,978,979],{},"鍵盤は同じだよ。でも名前を G♭ にすると、数え方は G から始まるんだ。",[100,981],{"black-labels":268,"highlight":982,"label":983,"notes":984,"octaves":663,"start-octave":105,"gap":664,"markings":985},"F#4,A#4","G♭ → A♭ → B♭","F#4,G#4,A#4","F#4:1,G#4:2,A#4:3",[11,987,988,112,991,112,994,957,997,999],{},[69,989,990],{},"Gb",[69,992,993],{},"Ab",[69,995,996],{},"Bb",[69,998,996],{},"。物理的には同じ場所だけど、書き方が違うんだ。",[24,1001,1002],{"by":26},[11,1003,1004,1005,513,1007,1009],{},"えっ、ちょっと待って。 ",[69,1006,956],{},[69,1008,996],{}," って、同じ鍵盤じゃないよね？",[24,1011,1012,1019],{"by":32},[11,1013,1014,1015,1018],{},"そう、ここがポイント！F♯ からの3度上は A、G♭ からの3度上は B♭。",[15,1016,1017],{},"最後の鍵盤も違う"," んだ。",[11,1020,1021],{},"数え方が違うから、当然の結果なんだけどね。",[24,1023,1024],{"by":26},[11,1025,1026],{},"へえ……。名前で数えてるから、同じ場所から始めても別の景色になる。",[240,1028,1033],{"label":1029,"suffix":1030,"title":1031,"value":1032},"Naming","に決める","黒鍵は名前を選んでから数える","先",[11,1034,1035],{},"F♯ と G♭ は物理的に同じ鍵盤。でも度を数えるときは、まずどちらの文字（F か G か）として扱うかを決めてから。文字が決まれば、上に積む数え方も決まる。",[20,1037,1039],{"id":1038},"同じ場所なのに度数が違う","同じ場所なのに、度数が違う？",[24,1041,1042],{"by":26},[11,1043,1044,1045,654,1047,1049,1050,654,1052,1055],{},"じゃあもうひとつ気になる。たとえば ",[69,1046,71],{},[69,1048,294],{}," と、 ",[69,1051,71],{},[69,1053,1054],{},"D#"," って、同じ場所だよね？",[24,1057,1058,1061,1064],{"by":32},[11,1059,1060],{},"そう、E♭ と D♯ は同じ鍵盤なんだ。",[100,1062],{"black-labels":268,"highlight":773,"label":1063,"notes":773,"octaves":663,"start-octave":105,"duration":106},"C と D♯（= E♭）",[11,1065,1066],{},"でも、名前で数えると……",[24,1068,1069],{"by":26},[11,1070,1071],{},"C, D♯ ……2つで2度？",[24,1073,1074,1081,1085,1091,1096],{"by":32},[11,1075,1076,1077,1080],{},"そう、C → D♯ は2度だよ。",[15,1078,1079],{},"増2度"," って呼ぶんだ。",[100,1082],{"black-labels":268,"highlight":773,"label":1083,"notes":773,"octaves":663,"start-octave":105,"gap":664,"markings":1084},"C → D♯ = 2度（増2度）","C4:1,D#4:2",[11,1086,1087,1088,1090],{},"一方、C → E♭ は文字で数えると C, D, E の3つで3度になる。こっちは ",[15,1089,336],{}," だね。",[100,1092],{"black-labels":268,"highlight":773,"label":1093,"notes":1094,"octaves":663,"start-octave":105,"gap":664,"markings":1095},"C → E♭ = 3度（短3度）","C4,D4,D#4","C4:1,D4:2,D#4:3",[11,1097,1098],{},"鍵盤の場所も響きも全く同じ。でも、書き方ひとつで度数が違うんだ。",[24,1100,1101],{"by":26},[11,1102,1103],{},"ええ、それは混乱する。",[24,1105,1106,1113],{"by":32},[11,1107,1108,1109,1112],{},"これが「",[15,1110,1111],{},"異名同音","（いめいどうおん）」っていう現象なんだ。同じ音でも、文脈で名前を選ぶ、ってこと。",[11,1114,1115],{},"スケールやコードのなかで「次の文字」がほしいときは E♭ を使うし、「半音上がった D」が欲しいときは D♯ を使う。状況で書き分けるんだよね。",[24,1117,1118],{"by":26},[11,1119,1120],{},"鍵盤で見ると「同じ音」だけど、音楽の文章のなかでは「別物」って感じか。",[24,1122,1123],{"by":32},[11,1124,1125,1126,1129],{},"そう、それが近いね。鍵盤じゃなく ",[15,1127,1128],{},"音名のロジック"," で度は決まるんだ。",[24,1131,1132],{"by":26},[11,1133,1134],{},"なるほど、鍵盤だけ見てても答えは出ないんだ。",[240,1136,1141],{"label":1137,"suffix":1138,"title":1139,"value":1140},"Enharmonic","≠ 同度","同じ音、違う名前 → 違う度","同音",[11,1142,1143],{},"C → D♯ と C → E♭ は同じ鍵盤・同じ響き。でも前者は「増2度」、後者は「短3度」と、度の数も質も違う。度は鍵盤じゃなく音名で決まる。",[24,1145,1146],{"by":26},[11,1147,1148],{},"そっか、鍵盤の「ここからここまで」じゃなくて、「この文字からこの文字まで」で考えるんだ。",[556,1150,1151,1157,1163],{},[559,1152,1154],{"question":1153},"どっちの名前を使うかは、誰が決めるの？",[11,1155,1156],{},"曲のキー（調）や、その場の文脈で決まるよ。F♯ メジャーのスケールなら全部 ♯、G♭ メジャーなら全部 ♭、というふうに揃える。",[559,1158,1160],{"question":1159},"「増2度」と「短3度」って響きは同じ？",[11,1161,1162],{},"ピアノで弾けば同じだよ。でも音楽の文章としては別物として扱う。マイナースケールでは「増2度」が出てきても「短3度」と書かない、みたいな使い分けがある。",[559,1164,1166],{"question":1165},"C♯ と D♭ も同じ？",[11,1167,1168],{},"そう、同じ。物理的には全部の黒鍵に2つの名前がある（C♯\u002FD♭、D♯\u002FE♭、F♯\u002FG♭、G♯\u002FA♭、A♯\u002FB♭）。場面によって選ぶんだ。",{"title":37,"searchDepth":38,"depth":38,"links":1170},[1171,1172,1173],{"id":934,"depth":38,"text":935},{"id":968,"depth":38,"text":969},{"id":1038,"depth":38,"text":1039},[1175],"発展","「度って何？」のつづき。同じ鍵盤でも F♯ と呼ぶか G♭ と呼ぶかで数え方が変わる、「名前の選び方」で音楽のロジックが決まる話。",{},1,"\u002Fnodes\u002Fenharmonic",[1181],{"to":611,"by":32,"text":1182},"黒鍵を扱う前に、まずこっちの「度の数え方」を読んでおくと話が早いんだ。",{"prerequisite":1184,"extends":1185},[611],[],{"title":853,"description":37},"nodes\u002Fenharmonic",[622,1175],"Degree on Black Keys","hR3Cck9P-Z-5_NRGkkCF3uMhLNOLkBM7t6Jk83DVlGY",{"id":1192,"title":1193,"body":1194,"date":41,"description":37,"domains":1380,"draft":45,"extension":46,"lead":1381,"meta":1382,"navigation":49,"order":38,"path":1383,"relatedNotes":1384,"relations":1389,"seo":1392,"stem":1393,"tags":1394,"titleEn":1395,"updated":50,"__hash__":1396},"nodes\u002Fnodes\u002Finterval.md","音程って何？",{"type":8,"value":1195,"toc":1376},[1196,1204,1228,1233,1237,1242,1256,1264,1282,1287,1293,1297,1305,1317,1322,1327,1332],[24,1197,1198,1201],{"by":26},[11,1199,1200],{},"ね、ロン。この前歌ってたら「音程ズレてる」って言われたんだけど。",[11,1202,1203],{},"そもそも音程って何？",[24,1205,1206,1209,1216,1221],{"by":32},[11,1207,1208],{},"あ、それね！音程っていうのは、ふたつの音の高さの距離のことなんだ。",[11,1210,1211,1212,513,1214,960],{},"たとえばこれ — ",[69,1213,71],{},[69,1215,118],{},[100,1217],{"gap":1218,"highlight":519,"label":1219,"markings":1220,"notes":519,"octaves":663,"start-octave":105},"0.5","C → G","C#4:1,D4:2,D#4:3,E4:4,F4:5,F#4:6,G4:7",[11,1222,1223,1224,1227],{},"鳴らしても、見ても、二つの音が「離れてる」のがわかるよね。その ",[15,1225,1226],{},"離れ方の大きさそのもの"," を、音程って呼ぶんだ。",[24,1229,1230],{"by":26},[11,1231,1232],{},"ふーん、距離か。",[20,1234,1236],{"id":1235},"距離が同じなら同じ音程","距離が同じなら、同じ音程",[24,1238,1239],{"by":26},[11,1240,1241],{},"別の音から始めても、「同じ離れ方」って成り立つ？",[24,1243,1244,1247,1251],{"by":32},[11,1245,1246],{},"ちょっと聞いてみようか。",[100,1248],{"gap":1218,"highlight":660,"label":1249,"markings":1250,"notes":660,"octaves":663,"start-octave":105},"C → E","C#4:1,D4:2,D#4:3,E4:4",[100,1252],{"gap":1218,"highlight":1253,"label":1254,"markings":1255,"notes":1253,"octaves":663,"start-octave":105},"D4,F#4","D → F#","D#4:1,E4:2,F4:3,F#4:4",[24,1257,1258,1261],{"by":26},[11,1259,1260],{},"……あ、似てる。同じ「離れ方」の感じ。",[11,1262,1263],{},"でもこれって、高さの差を引き算するみたいな話？",[24,1265,1266,1269],{"by":32},[11,1267,1268],{},"あ、それはね、引き算じゃなくて、鍵盤の白＋黒の数で見るんだよ。",[11,1270,1271,1273,1274,1276,1277,1273,1279,1281],{},[69,1272,71],{}," → ",[69,1275,115],{}," も ",[69,1278,672],{},[69,1280,951],{}," も、半音4つぶんになる。だから「同じ音程」って言えるんだ。",[24,1283,1284],{"by":26},[11,1285,1286],{},"ああ、鍵盤で数えるのか。",[240,1288,1290],{"label":741,"suffix":816,"title":1289,"value":105},"同じ離れ方 = 同じ音程",[11,1291,1292],{},"鍵盤の白＋黒で半音4つぶん。C→E も D→F# も、始まる音が違っても距離は同じ。だから同じ音程として扱う。",[20,1294,1296],{"id":1295},"音程ズレてるってほんとは","「音程ズレてる」って、ほんとは……？",[24,1298,1299,1302],{"by":26},[11,1300,1301],{},"……じゃあちょっと待って。「音程ズレてる」って言われたんだけど、それ、変じゃない？",[11,1303,1304],{},"私が外したのは一個の音でしょ。",[24,1306,1307,1314],{"by":32},[11,1308,1309,1310,1313],{},"そう、そこなんだよね。厳密にはそれ、",[15,1311,1312],{},"音高（おんこう）"," のほうなんだ。音そのものの高さのこと、だね。",[11,1315,1316],{},"音程は「二つの音の関係」のことだから、ひとつだけだとズレようがないんだよね。",[24,1318,1319],{"by":26},[11,1320,1321],{},"じゃあ私が言われたのは「音高がズレてる」が正しいわけか。",[24,1323,1324],{"by":32},[11,1325,1326],{},"うん、ふだんは混ぜて使われるけどね。でも区別がつくと、音楽の話がぐっと見やすくなるんだよ。",[24,1328,1329],{"by":26},[11,1330,1331],{},"覚えとく。",[556,1333,1334,1348,1361],{},[559,1335,1337,1345],{"question":1336},"音程って、いつ使うの？和音？メロディ？",[11,1338,1339,1340,1344],{},"両方だよ。和音は音程を縦に積んだもの（",[167,1341,1343],{"href":1342},"\u002Fchord\u002F","三和音","）、メロディは音程を横につないだもの（スケール）。",[11,1346,1347],{},"どっちにしても、出てくる音と音の関係を語るのが音程なんだ。",[559,1349,1351,1354],{"question":1350},"音程と「度数」って違うもの？",[11,1352,1353],{},"度数は音程の「数え方」の一部だよ。半音いくつ離れてるかを「2度」「3度」みたいな単位で表したもの。",[11,1355,1356,1357,1360],{},"音程＝距離そのもの、度数＝その距離の呼び方、というイメージかな（→ ",[167,1358,1359],{"href":169},"度数","）。",[559,1362,1364,1373],{"question":1363},"オクターブ違いの音も「音程」あるの？",[11,1365,1366,1367,513,1370,1372],{},"あるよ。 ",[69,1368,1369],{},"C4",[69,1371,724],{}," は「8度（オクターブ）」って呼ぶ音程の関係。",[11,1374,1375],{},"名前は同じ C でも高さは違うから、距離はゼロじゃないんだ。",{"title":37,"searchDepth":38,"depth":38,"links":1377},[1378,1379],{"id":1235,"depth":38,"text":1236},{"id":1295,"depth":38,"text":1296},[604],"音楽において「音程（インターバル）」とは、ふたつの音の高さの距離のこと。鳴らして、聴いて、その「離れ方」を確かめる。",{},"\u002Fnodes\u002Finterval",[1385,1387],{"to":878,"by":32,"text":1386},"音と音の話に入る前に、まず「音の名前」を押さえておくと話が早いんだ。CDE で進めるからね。",{"to":611,"by":32,"text":1388},"音程の「距離」を別の数え方で見るのが「度」だよ。半音いくつ離れてるかと、何度離れてるか。両方つかうと話が早いんだ。",{"prerequisite":1390,"extends":1391},[878],[611,143,886],{"title":1193,"description":37},"nodes\u002Finterval",[622,604],"Intervals","v3nqbP0AGspfUINvjvyhn8420R7vj82UoZ6dAep3fyk",{"id":1398,"title":1399,"body":1400,"date":865,"description":37,"domains":1640,"draft":45,"extension":46,"lead":1641,"meta":1642,"navigation":49,"order":1178,"path":1643,"relatedNotes":1644,"relations":1652,"seo":1655,"stem":1656,"tags":1657,"titleEn":1658,"updated":50,"__hash__":1659},"nodes\u002Fnodes\u002Fnote-name.md","ドレミと CDE、音の名前",{"type":8,"value":1401,"toc":1636},[1402,1415,1431,1436,1449,1454,1463,1467,1472,1523,1528,1546,1551,1560,1564,1569,1586,1591,1606,1611],[24,1403,1404],{"by":26},[11,1405,1406,1407,1409,1410,1409,1412,1414],{},"ね、楽譜とかコードのところで ",[69,1408,71],{}," とか ",[69,1411,672],{},[69,1413,115],{}," って文字よく見るんだけど、ドとかレとかとは別物？",[24,1416,1417,1420],{"by":32},[11,1418,1419],{},"あ、それね！同じものを違う書き方してるだけなんだ。",[11,1421,1422,1423,1425,1426,1428,1429,960],{},"ド = ",[69,1424,71],{},"、レ = ",[69,1427,672],{},"、ミ = ",[69,1430,115],{},[24,1432,1433],{"by":26},[11,1434,1435],{},"あ、対応してるんだ。",[24,1437,1438,1441,1446],{"by":32},[11,1439,1440],{},"うん。鍵盤の白鍵に、ドレミの7音と、CDEFGAB の7文字が、それぞれ1対1で割り当てられてるんだ。",[100,1442],{"gap":664,"label":1443,"notes":1444,"octaves":663,"start-octave":105,"markings":1445},"ド → レ → ミ → ファ → ソ → ラ → シ","C4,D4,E4,F4,G4,A4,B4","C4:ド,D4:レ,E4:ミ,F4:ファ,G4:ソ,A4:ラ,B4:シ",[11,1447,1448],{},"英語圏（と理論書）では CDEFGAB を使う。日本では日常的にはドレミ、楽譜やコード表記では CDE をよく使うんだよね。",[24,1450,1451],{"by":26},[11,1452,1453],{},"両方おぼえないといけないのか……。",[24,1455,1456],{"by":32},[11,1457,1458,1459,1462],{},"慣れたら自然に切り替わるよ。基本は ",[15,1460,1461],{},"同じ場所を指してるだけ"," っていう感覚で OK だよ。",[20,1464,1466],{"id":1465},"黒鍵にはかを足す","黒鍵には「♯」か「♭」を足す",[24,1468,1469],{"by":26},[11,1470,1471],{},"ちょっと、白鍵だけ7文字って、黒鍵には名前ないの？",[24,1473,1474,1485,1491,1516],{"by":32},[11,1475,1476,1477,1480,1481,1484],{},"あ、あるよ。黒鍵には、隣の白鍵の名前に ",[15,1478,1479],{},"♯（シャープ）"," か ",[15,1482,1483],{},"♭（フラット）"," を足して呼ぶんだ。",[100,1486],{"gap":664,"label":1487,"notes":1488,"octaves":663,"start-octave":105,"markings":1489,"highlight":1490},"C → C♯ → D","C4,C#4,D4","C4:1,C#4:2,D4:3","C#4",[11,1492,1493,513,1495,1497,1498,1501,1502,1507,1508,1501,1511,960],{},[69,1494,71],{},[69,1496,672],{}," の間の黒鍵は、C から見て ",[15,1499,1500],{},"半音上"," だから ",[15,1503,1504],{},[69,1505,1506],{},"C#","、D から見て ",[15,1509,1510],{},"半音下",[15,1512,1513],{},[69,1514,1515],{},"Db",[11,1517,1518,1519,1522],{},"つまり、同じ鍵盤に ",[15,1520,1521],{},"2つの名前"," があるんだ。",[24,1524,1525],{"by":26},[11,1526,1527],{},"え、同じものに2つも名前があるの？まぎらわしくない？",[24,1529,1530,1533],{"by":32},[11,1531,1532],{},"うん、ちょっと不思議だよね。でも文脈で使い分けるんだ。",[11,1534,1535,1537,1538,1540,1541,1537,1543,1545],{},[69,1536,71],{}," を基準にしてる話なら ",[69,1539,1506],{}," を使うし、 ",[69,1542,672],{},[69,1544,1515],{}," を使うんだ。",[24,1547,1548],{"by":26},[11,1549,1550],{},"へえ、まわりの音との関係で決まるんだ。",[240,1552,1557],{"label":1553,"suffix":1554,"title":1555,"value":1556},"Note Name","名","白鍵7文字＋黒鍵に ♯／♭","7 + 2",[11,1558,1559],{},"音名は CDEFGAB の7文字（白鍵）が基本。黒鍵は隣の白鍵に ♯（半音上）か ♭（半音下）を足して呼ぶ。同じ黒鍵に2つの名前がつく。",[20,1561,1563],{"id":1562},"_7文字でひと回り次のオクターブ","7文字でひと回り、次のオクターブ",[24,1565,1566],{"by":26},[11,1567,1568],{},"じゃあ、B（シ）の次はどうなるの？8文字目があるの？",[24,1570,1571,1574,1579],{"by":32},[11,1572,1573],{},"ううん、B の次はまた C に戻るんだ。鍵盤を右に進むと、CDEFGAB CDEFGAB …… と、7文字がぐるぐるくり返すんだよ。",[100,1575],{"gap":1576,"label":1577,"notes":1578,"octaves":104,"start-octave":105},"0.2","2オクターブぶん","C4,D4,E4,F4,G4,A4,B4,C5,D5,E5,F5,G5,A5,B5",[11,1580,1581,1582,1585],{},"ひとまわりぶんの距離を「",[15,1583,1584],{},"オクターブ","」って呼ぶよ。",[24,1587,1588],{"by":26},[11,1589,1590],{},"同じ名前が、高さ違いでくり返してるんだ。",[24,1592,1593],{"by":32},[11,1594,1595,1596,1598,1599,1602,1603,1605],{},"うん。同じ ",[69,1597,71],{}," でも、低い ",[69,1600,1601],{},"C3"," と、高い ",[69,1604,724],{}," はオクターブ違いの仲間なんだ。",[24,1607,1608],{"by":26},[11,1609,1610],{},"ふーん、文字は12個もいらなくて、7文字でやりくりしてるのか。",[556,1612,1613,1624,1630],{},[559,1614,1616],{"question":1615},"なぜドレミと CDE の2つがあるの？",[11,1617,1618,1619,1623],{},"歴史的な経緯だよ。ドレミ系（イタリア語起源）は歌う時に使われ、CDE系（英語）は楽譜やコードの表記で使われることが多い。指してる音は同じ。詳しくは ",[167,1620,1622],{"href":1621},"\u002Fnote-name-history\u002F","ドレミと CDE はどこから来たのか"," を読んでみて。",[559,1625,1627],{"question":1626},"ドイツ語の H って聞いたことあるけど？",[11,1628,1629],{},"ドイツ語圏では B のことを H と書くんだ（紛らわしいけど）。日常的には CDE 系で読めば困らないよ。",[559,1631,1633],{"question":1632},"日本語の「ハニホヘト」は？",[11,1634,1635],{},"日本古来の音名で、C=ハ、D=ニ、E=ホ、F=ヘ、G=ト、A=イ、B=ロ。「ハ長調」の「ハ」は C のことだよ。",{"title":37,"searchDepth":38,"depth":38,"links":1637},[1638,1639],{"id":1465,"depth":38,"text":1466},{"id":1562,"depth":38,"text":1563},[604],"「ド・レ・ミ」と「C・D・E」、書き方は違うけど、指してるものは同じ。音の名前のつけ方の話。",{},"\u002Fnodes\u002Fnote-name",[1645,1648,1650],{"to":1646,"by":26,"text":1647},"note-name-history","なんで同じ音に2つも名前があるの？って気になった人はこっち。歴史の話。",{"to":881,"by":32,"text":1649},"音の名前がわかったら、次は「音と音の関係」をつかむといい流れになるよ。",{"to":611,"by":32,"text":1651},"名前を使って「何度離れてる？」を数えるのが「度」の話。CDE で考えると速いんだ。",{"prerequisite":1653,"extends":1654},[],[881,611,1646],{"title":1399,"description":37},"nodes\u002Fnote-name",[622,604],"Note Names","Q4H11XyLr7FjvFg7FqYjuQ230qt9yE0I8bQb5f91YW8",{"id":1661,"title":1622,"body":1662,"date":602,"description":37,"domains":2171,"draft":45,"extension":46,"lead":2172,"meta":2173,"navigation":49,"order":38,"path":2174,"relatedNotes":2175,"relations":2178,"seo":2181,"stem":2182,"tags":2183,"titleEn":2185,"updated":50,"__hash__":2186},"nodes\u002Fnodes\u002Fnote-name-history.md",{"type":8,"value":1663,"toc":2165},[1664,1682,1691,1696,1711,1715,1723,1728,1739,1744,1780,1785,1788,1797,1802,1818,1823,1932,1937,1977,1982,1990,1993,1998,2010,2015,2045,2050,2062,2067,2082,2086,2091,2110,2115,2123],[24,1665,1666,1679],{"by":26},[11,1667,1668,1669,1672,1673,1675,1676,1678],{},"ね、",[167,1670,1671],{"href":840},"前のページ"," で ",[69,1674,71],{}," = ド、 ",[69,1677,672],{}," = レ……って同じ音に2つの名前があるって話だったよね。なんでわざわざ2つあるんだろう？混乱しない？",[11,1680,1681],{},"混乱した方を消せばよかったのに。",[24,1683,1684],{"by":32},[11,1685,1686,1687,1690],{},"あー、それはそうなんだけど、実は ",[15,1688,1689],{},"別々の場所で、別々の目的のために"," つくられたものが、たまたま両方残ってるっていうのが正直なところなんだ。",[24,1692,1693],{"by":26},[11,1694,1695],{},"別々の目的？",[24,1697,1698,1700],{"by":32},[11,1699,547],{},[11,1701,1702,1703,1706,1707,1710],{},"ざっくり言うと、CDE は「",[15,1704,1705],{},"書くため","」の名前で、ドレミは「",[15,1708,1709],{},"歌うため","」の名前として生まれたんだよ。",[20,1712,1714],{"id":1713},"cde-のほうが先","CDE のほうが先",[24,1716,1717,1720],{"by":32},[11,1718,1719],{},"順番でいうと、CDE のほうが古いんだ。",[11,1721,1722],{},"古代ギリシャまでさかのぼると、音にギリシャ文字を当てて記録してたんだ。それがローマ時代にラテン文字に置き換わって、6世紀ごろにはもう A〜G の7文字で音を表す習慣ができてた。",[24,1724,1725],{"by":26},[11,1726,1727],{},"6世紀って、めっちゃ昔だ。",[24,1729,1730,1736],{"by":32},[11,1731,533,1732,1735],{},[15,1733,1734],{},"音を紙に書いて記録する","ための道具として、文字を使うのは自然だよね。",[11,1737,1738],{},"楽譜が発達するにつれて、この A〜G がそのまま定着していった。今でも英語圏や理論書で CDE を使うのはこの流れなんだ。",[24,1740,1741],{"by":26},[11,1742,1743],{},"あれ、でもなんで A じゃなくて C から始まるの？アルファベットなら A が最初じゃない？",[24,1745,1746,1749,1756,1761,1772,1777],{"by":32},[11,1747,1748],{},"ね、それ思うよね。",[11,1750,1751,1752,1755],{},"文字が当てられた当時、",[15,1753,1754],{},"A の音から始まるスケール","（今でいう A マイナー＝自然短音階）が基準だったんだ。だから A=A、B=B、…… と素直に並んだ。",[100,1757],{"label":1758,"notes":1759,"octaves":104,"start-octave":105,"gap":664,"highlight":1760},"A から数えると：A B C D E F G A","A4,B4,C5,D5,E5,F5,G5,A5","A4,A5",[11,1762,1763,1764,1767,1768,1771],{},"そのあと、時代が進んで「ドレミファソラシド」っぽい ",[15,1765,1766],{},"明るいスケール（メジャー）"," がよく使われるようになった。それが ",[15,1769,1770],{},"C から始まるとちょうど黒鍵を使わない"," ことに気づくんだ。",[100,1773],{"label":1774,"notes":1775,"octaves":104,"start-octave":105,"gap":664,"highlight":1776},"C から数えると：白鍵だけで1オクターブ","C4,D4,E4,F4,G4,A4,B4,C5","C4,C5",[11,1778,1779],{},"つまり「文字の起源は A だけど、説明しやすいキーは C」っていう、ちょっとねじれた状態が残ったまま今に至るんだ。",[24,1781,1782],{"by":26},[11,1783,1784],{},"へえ。文字は A スタートだけど、よく使うキーは C スタート、って2つのものさしが並走してる感じ。",[20,1786,1787],{"id":1787},"ドレミは修道院で生まれた",[24,1789,1790],{"by":32},[11,1791,1792,1793,1796],{},"じゃあドレミの話だよ。これは ",[15,1794,1795],{},"11世紀のイタリアの修道院"," で生まれたんだ。",[24,1798,1799],{"by":26},[11,1800,1801],{},"修道院。意外な場所だ。",[24,1803,1804,1807],{"by":32},[11,1805,1806],{},"当時、修道士たちは聖歌を覚えるのが大変で、「メロディを耳で覚えるのにいい方法ない？」って話になってた。",[11,1808,1809,1810,1813,1814,1817],{},"そこで ",[15,1811,1812],{},"グイード・ダレッツォ"," っていう音楽教師が、ある聖歌を持ち出した。「",[15,1815,1816],{},"ウト・クェアント・ラクシス","」って讃美歌で、ちょうど各行の最初の音が、1段ずつ階段みたいに上がっていく曲だったんだよ。",[100,1819],{"label":1820,"notes":1821,"octaves":663,"start-octave":105,"gap":180,"markings":1822},"各行の出だしの音だけ並べると","C4,D4,E4,F4,G4,A4","C4:Ut,D4:Re,E4:Mi,F4:Fa,G4:Sol,A4:La",[24,1824,1825,1832,1835,1925],{"by":32},[11,1826,1827,1828,1831],{},"グイードは「",[15,1829,1830],{},"この曲の各行の最初の音節を、音の名前にしちゃえばいい","」って考えた。",[11,1833,1834],{},"歌詞の最初の音節を順番にとると：",[398,1836,1837,1850],{},[401,1838,1839],{},[404,1840,1841,1844,1847],{},[407,1842,1843],{},"歌詞の始まり",[407,1845,1846],{},"音節",[407,1848,1849],{},"音",[419,1851,1852,1864,1876,1888,1901,1913],{},[404,1853,1854,1860,1862],{},[424,1855,1856,1859],{},[15,1857,1858],{},"Ut"," queant laxis",[424,1861,1858],{},[424,1863,71],{},[404,1865,1866,1872,1874],{},[424,1867,1868,1871],{},[15,1869,1870],{},"Re","sonare fibris",[424,1873,1870],{},[424,1875,672],{},[404,1877,1878,1884,1886],{},[424,1879,1880,1883],{},[15,1881,1882],{},"Mi","ra gestorum",[424,1885,1882],{},[424,1887,115],{},[404,1889,1890,1896,1898],{},[424,1891,1892,1895],{},[15,1893,1894],{},"Fa","muli tuorum",[424,1897,1894],{},[424,1899,1900],{},"F",[404,1902,1903,1909,1911],{},[424,1904,1905,1908],{},[15,1906,1907],{},"Sol","ve polluti",[424,1910,1907],{},[424,1912,118],{},[404,1914,1915,1921,1923],{},[424,1916,1917,1920],{},[15,1918,1919],{},"La","bii reatum",[424,1922,1919],{},[424,1924,956],{},[11,1926,1927,1928,1931],{},"これで、歌詞を覚えてるとメロディも芋づる式に出てくる、っていう ",[15,1929,1930],{},"記憶のフック"," ができた。",[24,1933,1934],{"by":26},[11,1935,1936],{},"あー、それは便利。",[24,1938,1939,1946,1949,1970],{"by":32},[11,1940,1941,1942,1945],{},"6音だから「",[15,1943,1944],{},"ヘクサコード（hexachord）","」って呼ばれた。これがドレミの原型なんだ。",[11,1947,1948],{},"時代が下って、",[224,1950,1951,1961],{},[227,1952,1953,1956,1957,1960],{},[15,1954,1955],{},"7音目"," が必要になって ",[15,1958,1959],{},"Si（後の Ti）"," が足された",[227,1962,1963,1965,1966,1969],{},[15,1964,1858],{}," は発音しにくいから ",[15,1967,1968],{},"Do"," に置き換わった（17世紀、イタリア）",[11,1971,1972,1973,1976],{},"それで ",[15,1974,1975],{},"Do Re Mi Fa Sol La Si (Ti)"," が今のかたちで定着した。",[24,1978,1979],{"by":26},[11,1980,1981],{},"へえ、修道院の暗記ツールが、いま小学校の音楽の教科書に載ってるってことか。",[240,1983,1987],{"label":1984,"suffix":37,"title":1985,"value":1986},"Origin","文字は記録、ドレミは記憶","2 源流",[11,1988,1989],{},"CDE は古代〜中世ヨーロッパで「音を書き残すため」の名前として定着。ドレミは11世紀の修道院で「歌を覚えるため」の名前として生まれた。出発点も目的も別。",[20,1991,1992],{"id":1992},"なぜ両方が日本に残ったか",[24,1994,1995],{"by":26},[11,1996,1997],{},"で、なんで日本ではどっちも使われてるの？",[24,1999,2000,2007],{"by":32},[11,2001,2002,2003,2006],{},"これも経緯があって、明治時代にヨーロッパ音楽が入ってきたとき、",[15,2004,2005],{},"学校教育用の音楽"," はイタリア・フランス由来のドレミで導入されたんだ。",[11,2008,2009],{},"子どもに歌わせるのに「ド・レ・ミ」のほうが自然だったし、ヨーロッパでも学校音楽はドレミでやってたから、それをそのまま輸入した。",[24,2011,2012],{"by":26},[11,2013,2014],{},"じゃあ CDE は？",[24,2016,2017,2024,2027,2031,2034,2042],{"by":32},[11,2018,2019,2020,2023],{},"こっちは戦後、",[15,2021,2022],{},"ジャズやポップス"," がアメリカから入ってきたときに一緒に来た。コードネームを書くには CDE のほうが圧倒的に短くて便利なんだ。",[11,2025,2026],{},"「Cmaj7」って書くのと「ハ長調セブンス」って書くのとどっちが楽？って話。",[100,2028],{"label":2029,"notes":2030,"octaves":104,"start-octave":105,"highlight":2030,"duration":106},"Cmaj7","C4,E4,G4,B4",[11,2032,2033],{},"だから日本では：",[224,2035,2036,2039],{},[227,2037,2038],{},"学校の音楽 → ドレミ",[227,2040,2041],{},"バンドのコード譜・楽器の教則本 → CDE",[11,2043,2044],{},"って棲み分けができたまま、両方が残ったんだ。",[24,2046,2047],{"by":26},[11,2048,2049],{},"ふーん、来たルートが違うから両方残ったのか。",[24,2051,2052,2055],{"by":32},[11,2053,2054],{},"そういうこと。",[11,2056,2057,2058,2061],{},"ちなみに ",[15,2059,2060],{},"ハニホヘト"," っていう日本独自の音名もあるよ。明治のころに作られた、CDE の和訳みたいなやつなんだ。",[24,2063,2064],{"by":26},[11,2065,2066],{},"ハニホヘト。聞いたことはある。",[24,2068,2069,2072],{"by":32},[11,2070,2071],{},"ハ＝C、ニ＝D、ホ＝E、ヘ＝F、ト＝G、イ＝A、ロ＝B。",[11,2073,2074,2075,2078,2079,2081],{},"「",[15,2076,2077],{},"ハ長調","」って言うのは「",[15,2080,103],{},"」のことなんだ。クラシック系の楽譜やラジオ番組で今も使われてるよ。",[20,2083,2085],{"id":2084},"つまり使い分けじゃなくて文化の重なり","つまり「使い分け」じゃなくて「文化の重なり」",[24,2087,2088],{"by":26},[11,2089,2090],{},"どっちで覚えたらいい、とかある？",[24,2092,2093,2100,2103],{"by":32},[11,2094,2095,2096,2099],{},"答えは「",[15,2097,2098],{},"両方なんとなく"," で OK」だよ。",[11,2101,2102],{},"歌うときや音感の話ではドレミが速いし、コードを書くときや理論で考えるときは CDE が速い。",[11,2104,2105,2106,2109],{},"無理に統一しようとせず、",[15,2107,2108],{},"場面に応じて切り替わるものなんだ"," と思っておけば、迷わなくなるよ。",[24,2111,2112],{"by":26},[11,2113,2114],{},"混乱した方を消す、じゃなくて、両方の生まれた背景を知ったら、なんかどっちも消しがたい気がしてきた。",[24,2116,2117,2120],{"by":32},[11,2118,2119],{},"1000年かけて積み上がったものだからね。",[11,2121,2122],{},"歌の覚え方として生まれたドレミと、書き残すために生まれた CDE。両方の役割が今も残ってる、ってだけの話なんだ。",[556,2124,2125,2139,2149],{},[559,2126,2128],{"question":2127},"ドイツ語の H って何？",[11,2129,2130,2131,2134,2135,2138],{},"ドイツ語圏では、B のことを ",[15,2132,2133],{},"H","、B♭ のことを ",[15,2136,2137],{},"B"," と書くんだ。中世の写本で b の文字に2つの形（角ばった b と丸い b）があったのが、それぞれ独立した記号に分かれて H と B になった、っていう書き文字由来の歴史。",[559,2140,2142],{"question":2141},"フランス語の Si と英語の Ti は同じもの？",[11,2143,2144,2145,2148],{},"そう、同じ7番目の音（B）を指す。イタリア語・フランス語では Si、英語圏ではドレミを教える時に Ti を使う。これは「",[15,2146,2147],{},"頭文字がかぶらないように","」(Sol と Si が両方 S で始まる）変えた、っていう実用的な理由。",[559,2150,2152],{"question":2151},"ドレミは「動く」って聞いたけど？",[11,2153,2074,2154,2157,2158,2161,2162,2164],{},[15,2155,2156],{},"移動ド","」と「",[15,2159,2160],{},"固定ド","」っていう2つの考え方がある。固定ドは ",[69,2163,71],{}," = 常に「ド」。移動ドはキーの主音をドと呼ぶ（G メジャーなら G がド）。日本の学校では固定ドが多いけど、ソルフェージュ訓練では移動ドを使うこともある。これはまた別の長い話。",{"title":37,"searchDepth":38,"depth":38,"links":2166},[2167,2168,2169,2170],{"id":1713,"depth":38,"text":1714},{"id":1787,"depth":38,"text":1787},{"id":1992,"depth":38,"text":1992},{"id":2084,"depth":38,"text":2085},[1175],"同じ音なのに2つの名前がある理由は、別々の場所で別々の目的のために生まれた2つの記譜文化が、日本でたまたま両方残ったから。",{},"\u002Fnodes\u002Fnote-name-history",[2176],{"to":878,"by":32,"text":2177},"「2つあるんだ」までは前の記事で。ここはその続き、なんでそうなったかの話。",{"prerequisite":2179,"extends":2180},[878],[],{"title":1622,"description":37},"nodes\u002Fnote-name-history",[622,2184,1175],"History","Where Note Names Come From","cMdZt6zmERManU_YCLT_Nuh4BGViFTMQnQD7_KHQKGo",{"id":2188,"title":2189,"body":2190,"date":865,"description":2194,"domains":2341,"draft":45,"extension":46,"lead":2342,"meta":2343,"navigation":49,"order":50,"path":2344,"relatedNotes":50,"relations":50,"seo":2345,"stem":2346,"tags":2347,"titleEn":2348,"updated":50,"__hash__":2349},"nodes\u002Fnodes\u002Fprivacy.md","プライバシーポリシー",{"type":8,"value":2191,"toc":2330},[2192,2195,2199,2202,2207,2210,2214,2217,2228,2238,2242,2288,2297,2300,2303,2312,2315,2318,2321,2324,2327],[11,2193,2194],{},"このページは、Ring Rong（以下「当サイト」）が利用者の情報をどのように扱うかを記載しています。",[20,2196,2198],{"id":2197},"アクセス解析行動分析について","アクセス解析・行動分析について",[11,2200,2201],{},"当サイトでは、サイトの改善のために以下のアクセス解析・行動分析サービスを利用しています。これらのサービスは Cookie および類似の技術を使用して、訪問者のページ閲覧・操作に関する匿名のデータを収集します。個人を特定する情報（氏名・メールアドレス等）は収集していません。",[2203,2204,2206],"h3",{"id":2205},"cloudflare-web-analytics","Cloudflare Web Analytics",[11,2208,2209],{},"ページビューや国別の集計などの基本的なトラフィック解析に利用しています。Cookie を使用しない仕組みです。",[2203,2211,2213],{"id":2212},"microsoft-clarity","Microsoft Clarity",[11,2215,2216],{},"ユーザーがサイトをどのように利用しているかを理解し、UI を改善するために利用しています。Clarity は以下を取得します。",[224,2218,2219,2222,2225],{},[227,2220,2221],{},"ページ内でのクリック・タップ・スクロールの位置",[227,2223,2224],{},"セッション内の操作の再生（録画）",[227,2226,2227],{},"ヒートマップ・ページ内エンゲージメント指標",[11,2229,2230,2231,2237],{},"Clarity が収集するデータは Microsoft 社のサーバーに送信・保管されます。詳細は ",[167,2232,2236],{"href":2233,"rel":2234},"https:\u002F\u002Fprivacy.microsoft.com\u002Fja-jp\u002Fprivacystatement",[2235],"nofollow","Microsoft プライバシーステートメント"," を参照してください。",[2203,2239,2241],{"id":2240},"外部送信される情報について電気通信事業法","外部送信される情報について（電気通信事業法）",[398,2243,2244,2260],{},[401,2245,2246],{},[404,2247,2248,2251,2254,2257],{},[407,2249,2250],{},"サービス",[407,2252,2253],{},"送信先",[407,2255,2256],{},"送信される情報",[407,2258,2259],{},"目的",[419,2261,2262,2275],{},[404,2263,2264,2266,2269,2272],{},[424,2265,2206],{},[424,2267,2268],{},"Cloudflare, Inc.（米国）",[424,2270,2271],{},"アクセス日時、リファラー、利用ブラウザ等の匿名集計データ",[424,2273,2274],{},"サイトアクセス解析",[404,2276,2277,2279,2282,2285],{},[424,2278,2213],{},[424,2280,2281],{},"Microsoft 社（米国）",[424,2283,2284],{},"ページ内操作（クリック・スクロール等）、セッション録画データ",[424,2286,2287],{},"UI 改善のための行動分析",[11,2289,2290,2291,2296],{},"Cookie の取得・利用を拒否したい場合は、ブラウザの Cookie 設定で無効化してください。Clarity については ",[167,2292,2295],{"href":2293,"rel":2294},"https:\u002F\u002Fclarity.microsoft.com\u002F",[2235],"Clarity オプトアウト"," からも拒否設定が可能です。",[20,2298,2299],{"id":2299},"広告配信について",[11,2301,2302],{},"当サイトでは将来的に、Google AdSense などの第三者配信の広告サービスを利用する場合があります。第三者配信事業者は Cookie を使用して、ユーザーのアクセスに関する情報に基づいて、適切な広告を表示します。",[11,2304,2305,2306,2311],{},"Google による Cookie の使用を無効にするには、 ",[167,2307,2310],{"href":2308,"rel":2309},"https:\u002F\u002Fwww.google.com\u002Fsettings\u002Fads",[2235],"広告設定"," ページにアクセスしてください。",[20,2313,2314],{"id":2314},"著作権について",[11,2316,2317],{},"当サイトに掲載されている文章・図版・コードは、引用や私的利用の範囲を超える場合、事前にご連絡ください。",[20,2319,2320],{"id":2320},"免責事項",[11,2322,2323],{},"当サイトに掲載する内容については正確性に努めていますが、その内容の正確性・安全性を保証するものではありません。当サイトの利用によって生じたいかなる損害についても、当サイトは責任を負いません。",[20,2325,2326],{"id":2326},"プライバシーポリシーの変更について",[11,2328,2329],{},"当サイトは、必要に応じて本ポリシーを変更することがあります。重要な変更がある場合は、当ページにて告知します。",{"title":37,"searchDepth":38,"depth":38,"links":2331},[2332,2337,2338,2339,2340],{"id":2197,"depth":38,"text":2198,"children":2333},[2334,2335,2336],{"id":2205,"depth":869,"text":2206},{"id":2212,"depth":869,"text":2213},{"id":2240,"depth":869,"text":2241},{"id":2299,"depth":38,"text":2299},{"id":2314,"depth":38,"text":2314},{"id":2320,"depth":38,"text":2320},{"id":2326,"depth":38,"text":2326},[44],"Ring Rong のアクセス解析・行動分析・広告配信・Cookie の利用について。",{},"\u002Fnodes\u002Fprivacy",{"title":2189,"description":2194},"nodes\u002Fprivacy",[55],"Privacy Policy","Y_SOIynuGG78tqiP-HvwFdt5NcMKI8fVnzk03bbSJVo",{"id":2351,"title":2352,"body":2353,"date":50,"description":2357,"domains":2472,"draft":45,"extension":46,"lead":2473,"meta":2474,"navigation":49,"order":50,"path":2475,"relatedNotes":50,"relations":50,"seo":2476,"stem":2477,"tags":2478,"titleEn":2480,"updated":50,"__hash__":2481},"nodes\u002Fnodes\u002Ftest.md","テスト記事",{"type":8,"value":2354,"toc":2461},[2355,2358,2370,2374,2380,2387,2394,2398,2401,2405,2408,2410,2413,2417,2420,2423,2425,2428,2435,2438,2442,2445,2448,2451,2455,2459],[11,2356,2357],{},"これは smoke test 用の最初の記事です。",[11,2359,2360,2361,2365,2366,2369],{},"ファイル名 ",[2362,2363,2364],"code",{},"test.md"," がそのまま URL ",[2362,2367,2368],{},"\u002Ftest"," になります。",[20,2371,2373],{"id":2372},"playbutton-の動作確認","PlayButton の動作確認",[11,2375,2376,2377],{},"C メジャー三和音： ",[2378,2379],"play-button",{"label":103,"notes":102},[11,2381,2382,2383],{},"セブンスコード： ",[2378,2384],{"label":2385,"notes":2386},"C7（MIDI番号指定）","60,64,67,70",[11,2388,2389,2390],{},"単音： ",[2378,2391],{"label":2392,"notes":2393,"duration":1218},"A4 単音","A4",[20,2395,2397],{"id":2396},"keyboard-の動作確認","Keyboard の動作確認",[11,2399,2400],{},"2 オクターブの普通の鍵盤：",[2402,2403],"keyboard",{"octaves":104,"start-octave":2404},"3",[11,2406,2407],{},"C メジャースケールをハイライト：",[2402,2409],{"octaves":663,"start-octave":105,"highlight":1444},[20,2411,2412],{"id":2412},"新機能の動作確認",[2203,2414,2416],{"id":2415},"サイズ違いxs-sm-md-lg","サイズ違い（xs \u002F sm \u002F md \u002F lg）",[2402,2418],{"octaves":663,"start-octave":105,"size":2419},"xs",[2402,2421],{"octaves":663,"start-octave":105,"size":2422},"sm",[2402,2424],{"octaves":663,"start-octave":105,"size":46},[2402,2426],{"octaves":663,"start-octave":105,"size":2427},"lg",[2203,2429,2431,2432],{"id":2430},"範囲指定-rangec4-g5","範囲指定 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