Emculweni, unxantathu yiseti yamanqaku amathathu anokubekwa kwisithathu. Igama elithi "harmonic triad" laqulunqwa nguJohannes Lippius kwi "Synopsis musicae novae" (1612).
Xa zibekwe kwisithathu, amalungu esithathu, ukusuka kweyona toni isezantsi ukuya kwephezulu, abizwa ngokuba: iNgcambu yesiThathu – yayo. ithuba Ngaphezulu kwengcambu ibeyisithathu esincinci (iisemitones ezintathu) okanye i-semitones engundoqo kwisithathu (ii-semitones ezine) eyeSihlanu - isithuba sayo esingentla kwesesithathu sibe sisithathu esincinci okanye isahlulo sesithathu esikhulu, kungoko isithuba saso esiphezu kwengcambu sibe sisihlanu esinciphileyo (iisemitones ezintandathu) , isihlanu esigqibeleleyo (ii-semitones ezisixhenxe), okanye i-augmented yesihlanu (ii-semitones ezisibhozo).
Ezo chords zibizwa ngokuba ziitriadic. Ezinye iithiyori zenkulungwane yamashumi amabini, ngakumbi uHoward Hanson kunye noCarlton Gamer, bayalandisa eli gama ukubhekisa kuyo nayiphi na indibaniselwano yeepitshi ezintathu ezahlukeneyo, nokuba lithini na ixesha phakathi kwabo.
Igama elisetyenziswe zezinye iithiyori kule ngqikelelo eqhelekileyo ngu “trichord”.
Abanye, ngokukodwa u-Allen Forte, basebenzisa eli gama ukubhekisa kwiindibaniso ezipakishwe ngokubonakalayo kwamanye amaxesha, njengaku “quartal triad”.Forte, Allen, (1973) Isakhiwo soMculo weAtonal (iNew Haven neLondon: Yale University Press): ISBN 0-300-02120-8 Ekupheleni kweRenaissance, umculo wobugcisa wasentshona wasuka kwindlela yochasa “ethe tye” ukuya kwinkqubela phambili efuna indlela “ethe nkqo”, ngaloo ndlela uthembele kakhulu kutriadi njengesiseko sokwakha ibhloko yentsebenziswano esebenzayo. .
Ithoni yengcambu kanxantathu, kunye nomgangatho we Isixa ehambelana nayo, ngokuyintloko misela umsebenzi kathathu onikiweyo.
Okwesibini, umsebenzi we-triad umiselwa ngumgangatho wayo: enkulu, encinci, iyancipha okanye inyuswe. Isithathu kwezi ntlobo zine zoonxantathu zifumaneka kwisikali esikhulu (okanye sediatonic).
NdinguJoost Nusselder, umseki weNeaera kunye nomthengisi womxholo, utata, kwaye ndiyakuthanda ukuzama izixhobo ezitsha ngesiginkci entliziyweni yothando lwam, kunye neqela lam, ndisenza amanqaku eblogi anzulu ukusukela ngo-2020. ukunceda abafundi abathembekileyo ngokurekhoda kunye neengcebiso zesiginci.
