Seven voices - Shichisei

Japanese: 七声 - しちせい
Seven voices - Shichisei
A term of Chinese and Japanese music theory. A sequence of seven tones (seven-tone scale) in one octave. In China, it refers to the first seven tones obtained by sanbun-sen-en, and as a result, it is a five-tone scale consisting of Gong, Shang, Jiao, Zheng, and Yu, with the addition of two tones, Henchi and Henkyu. The pitch relationship between each tone is equivalent to Fa, So, La, Si, Do, Re, Mi in Western music. Japanese Gagaku and Shomyo also adopted this theory, but the actual sequence is different, and is equivalent to So, La, Si, Do, Re, Mi, Fa. In addition, Ritsumei used its own name, and two tones, Ei Shang, a semitone higher than Shang, and Ei Yu, a semitone higher than Yu, were added, making it equivalent to Re, Mi, Fa, So, La, Si, Do. However, in reality, not all seven tones are used, and sometimes only five of them are used.

Source : Heibonsha Encyclopedia About MyPedia Information

Japanese:
中国・日本の音楽理論用語。1オクターブ内の7つの音からなる音列(7音音階)のこと。中国では三分損益で得られる最初の7つの音をいい,結果的に下から順に,宮(きゅう),商(しょう),角(かく),徴(ち),羽(う)からなる五声に,変徴(へんち),変宮(へんきゅう)の2音を加えたもの。各音の音程関係は西洋音楽のファソラシドレミに等しい。日本の雅楽や声明(しょうみょう)でも,その理論を取り入れたが,実際の音列は異なり,ソラシドレミファに等しくなった。そのほか,律旋では独自の名称を用いて,商よりも半音高い嬰(えい)商,羽よりも半音高い嬰羽の2音を加えてレミファソラシドに等しい音列が想定された。しかし事実上は七声が全部使われるわけではなく,ときによりそのうちの5音のみが使われる。

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