Tetrachord |
Tetraxordon ea Segerike, e khanyang. – khoele e mene, ho tsoa ho tetra, ka mantsoe a motsoako – nne le xordn – khoele
Sekala sa mehato e mene mofuteng oa bone e phethahetseng (mohlala, g – a – h – c). Boemo bo khethehileng ba T. har'a monodich. mehaho ea modal e khethoa ke ho sebelisana ha lintlha tse ka sehloohong tsa 2 tsa ho feto-fetoha ha molumo - linear (tse amanang le ho sisinyeha ho latela lithane tsa sekala ho tloha boemong ba ho ema) le harmonic (ka ho latellana - ka khanyetso ea likamano tsa li-consonant le dissonant). Karolo ea consonance e le molaoli oa motsamao oa melodic e ile ea qala ho fumana li-consonance tse patisaneng - ea bone, "consonance" ea "pele" (Gaudentius; bona Janus C., "Musici scriptores graeci", leq. 338). Ka lebaka la sena, T. (mme eseng octachord le pentachord) e fetoha eona e ka sehloohong pele ho litekanyo tse ling. sele ea tsamaiso ea modal. E joalo ke karolo ea T. ka Segerike se seng. mmino. Li-consonant bohale ba lithane tse etsang motheo oa T. ("fixed" - estotes, "gestuts") ke li-abutments ho eona, 'me li-mobiles (xinoumenoi - "kinemens") li ka fetoha, li theha ka hare ho mehato ea 4 decomp. diatonic, sekala sa chromatic le anharmonic. pelehi (sheba mekhoa ea boholo-holo ea Segerike). Ho kopana ha lipina tse ling ho ile ha etsa hore ho be le mekhoa e rarahaneng ea modal (ea bohlokoa ka ho fetisisa har'a bona ke mekhoa ea octave, e bitsoang "harmonies").
Lekholong la lenyalo. tsamaiso ea modal, ho fapana le Segerike, e le eona e ka sehloohong. mehlala ha e na T., empa meaho e mengata ea polyphonic - mokhoa oa octave, guidon hexachord. Leha ho le joalo, karolo ea T. e ntse e le ea bohlokoa haholo ho bona. Kahoo, kakaretso ea li-final tsa mekhoa ea mehleng e bohareng e theha T. DEFG (= defg tsamaisong ea kajeno ea notation); ka har'a moralo oa mokhoa oa octave, T. e ntse e le eona e ka sehloohong. sele ea sebopeho.
Guidon's hexachord ke tšubuhlellano ea li-dec tse tharo. ho latela nako ea diatonic. T.
Ka sebopeho sa sekala tšobotsi ea Serussia. nar. melodics, T. ea e mong kapa tse ling karohano sebopeho ke e 'ngoe ea bohlokoa ka ho fetisisa constituent elements. Mehlala e meng ea lipina tsa khale ka ho fetisisa, tekanyo ea pina e lekanyelitsoe ho T. (sheba Sound System). Sebopeho sa sekala sa letsatsi le letsatsi, se entsoeng ka li-trichords tsa molumo oa molumo ka nako ea bone pakeng tsa melumo e lutseng sebakeng se le seng haufi le li-trichords, se bonahatsa molao-motheo oa non-octave 'me o ka emeloa e le ketane ea li-tone-tone-semitone tetrachords (sheba Perfect. tsamaiso).
References: Janus S., Musici scriptores graeci, Lpz., 1895, reprografischer Nachdruck, Hildesheim, 1962; Musica enchiriadis, v kn.: Gerbert M., Scriptores ecclesiastici de musica sacra haholo-holo, t. 1, St. Blasien, 1784, reprogralischer Nachdruck, Hildesheim, 1963.
Yu. N. Kholopov
