Octave |

daga lat. octava - takwas

1) Matsayi na takwas na sikelin diatonic.

2) Mafi ƙasƙanci na tsayin sautin (overtones) waɗanda ke yin kowane sauti; bisa ga adadin oscillations yana nufin babban. sautin sikelin halitta kamar 2: 1. Tun da babban sautin ana kiran shi da sharaɗi azaman juzu'i na farko, sautin octave, bi da bi, ana ɗaukarsa na biyu.

3) Bangaren kida. sikelin, wanda ya haɗa da duk asali. matakai: yi, re, mi, fa, gishiri, la, si, ko goma sha biyu chromatic semitones. gamma.

Duk kiɗan. An raba sikelin zuwa bakwai cikakke kuma biyu ba cikakke O. An shirya su daga ƙasa zuwa sama a cikin tsari mai zuwa: subcontroc-tava (sauti na sama uku A2, B2, H2), counteroctave, babban O., ƙarami O., na farko O. ., O. na biyu, O. na uku, O. na huɗu, O. na biyar (ƙarashin sauti ɗaya - C5).

4) Tazara mai rufe matakan diatonic guda 8. sikelin da sautuna duka guda shida. O. yana ɗaya daga cikin tsantsar diatonic. tazara; acoustically cikakken magana ne. An ayyana shi a matsayin mai tsarki 8. Octave yana juya ya zama farima mai tsarki (tsarki 1); za'a iya ƙarawa da ragewa bisa ga ka'idodin canjin lokaci; yana aiki a matsayin ginshiƙi don samuwar tsaka-tsakin fili (fiye da faffadan octave). Ana amfani da O. sau da yawa don ninka sautukan waƙa don ƙara ƙarin cikar sauti da bayyanawa, da kuma ninki biyu masu jituwa. kuri'u, yawanci bass part. Zuwa aikin ƙungiyar mawaƙa, ƙananan bass (bass profundo), waɗanda ake kira octavists (duba Bass), an ba su amana da aikin sautunan ɓangaren bass wanda aka ninka sau biyu zuwa ƙasan octave.

Sassan Octave musamman halayen virtuoso pianoforte ne. kiɗa. Octave doublings kuma ana samun su a cikin kiɗa. samfur. don sauran kayan aikin. Daban-daban nau'ikan motsi na layi daya a cikin octaves ana amfani da su azaman fasaha. shiga don dalilai na ilimi. Dubi sikelin diatonic, Sikelin Halitta, Tazara.

Vakhromeev