Lub npe los los ntawm tetra (los ntawm Greek- "plaub ntawm ib yam dab tsi") thiab chord (los ntawm Greek chordon-" hlua" lossis "sau"). Nyob rau hauv ancient Greek suab paj nruag txoj kev xav, tetrachord tau qhia ib ntu ntawm cov txheej txheem zoo dua thiab tsawg dua uas cuam tshuam los ntawm cov ntawv sau tsis tau (Greek: ἑστῶτες); cov ntawv sau ntawm cov no yog txav tau (Greek: κινούμενοι).
Leej twg tsim tetrachord?
Qhov no txhais tau tias lawv txhua tus yuav tsum nyob hauv tsib lub ntsiab lus, lossis ib nrab kauj ruam, ntawm daim ntawv hauv paus. Tetrachords yog thawj zaug tsim thiab siv los ntawm cov Greeks thaum ub ua kev zoo siab rau kev sib piv zoo meej hauv suab paj nruag, thiab niaj hnub no feem ntau pom hauv suab paj nruag jazz.
Lub hom phiaj ntawm tetrachord yog dab tsi?
Tetracords yog zoo heev los rhuav tshem cov nplai rau hauv cov chunks uas tswj tau. Scales yooj yim heev kom paub tseeb thaum txhua yam koj yuav tsum nco ntsoov yog ob lub tetrachords es tsis txhob 8 sau ntawv.
Puas yog tetrachord ib triad?
Plaub tetrachords tshawb hauv Tshooj 6 yog tag nrho cov piv txwv ntawm cov ntawv sau ntxiv tetrachords. Ntawd yog, txhua lub tetrachord pib ua triad ua los ntawm peb cov ntawv sib txawv uas tau koom nrog lub suab paj nruag.
Dab tsi yog kev sib haum xeeb tetrachord?
Ib qho kev sib haum xeeb tetrachord yog ua ib nrab kauj ruam, ua raws li tag nrho + ib nrab kauj ruam (los yog 1½ kauj ruam), ua raws li ib nrab kauj ruam. Tag nrho + ib nrab kauj ruam (los yog 1½ kauj ruam lossis peb ib nrab kauj ruam) suab zoo li tus thib peb me tab sis nws yog suab paj nruag txawv. Hauv C kev sib haum xeeb me, Tetrachord II tau tsim nrog cov ntawv G, A♭, B, thiab C.
