Ka soo qaad magacyada gaarka ah ee qorayaasha qoraalka. Ku kala saar dhibic iyo xaraf.
Context:Ilaa xad, caadooyinka Yurub iyo Mareykanka way kala tageen Dagaalkii Labaad ee Adduunka ka dib. Waxaa ka mid ah heesaayayaasha ugu saameynta badan Yurub Pierre Boulez, Luigi Nono, iyo Karlheinz Stockhausen. Kii ugu horeeyay iyo kii ugu dambeeyayba waxay labaduba ahaayeen arday Olivier Messiaen. Falsafadda quruxda iyo sidoo kale koox farsamooyin wax lagu qoro oo muhiim ah xilligan waxay ahayd taxanaha (oo sidoo kale loo yaqaan "muusikada la dalbaday", "'muusikada' guud' ama "amarinta guud ee codka"), oo ka soo jeeday Arnold Schoenberg iyo Anton Webern (laakiin wuxuu ka soo horjeeday muusikada laba iyo tobanka ah ee caadiga ah), sidoo kale wuxuu si dhow ula xiriiray fikirka Le Corbusier ee modulator. Si kastaba ha noqotee, qaar ka mid ah fannaaniinta caadiga ah sida Dmitri Shostakovich iyo Benjamin Britten ayaa sii waday qaab-dhismeedka qaabeynta inkastoo dhaqdhaqaaqa taxanaha ah ee caanka ah.  Mareykanka dhexdiisa, heesaayayaasha sida Milton Babbitt, John Cage, Elliott Carter, Henry Cowell, Philip Glass, Steve Reich, George Rochberg, iyo Roger Sessions, waxay sameeyeen fikradooda. Qaar ka mid ah fannaaniintaas (Cage, Cowell, Glass, Reich) waxay matalayeen qaab cusub oo muusiga tijaabada ah, kaas oo bilaabay inuu su'aal ka keeno fikradaha aasaasiga ah ee muusikada sida calaamadeynta, waxqabadka, muddada, iyo ku celcelinta, halka kuwa kale (Babbitt, Rochberg, Sessions) ay qaabeeyeen ballaarinta u gaarka ah ee laba iyo tobanka toona ee taxanaha ah ee Schoenberg.
Pierre Boulez, Luigi Nono, Karlheinz Stockhausen, Olivier Messiaen, Arnold Schoenberg, Anton Webern, Le Corbusier, Dmitri Shostakovich, Benjamin Britten, Milton Babbitt, John Cage, Elliott Carter, Henry Cowell, Philip Glass, Steve Reich, George Rochberg, Roger Sessions Waxaa kaloo ka mid ah kuwa ugu caansan ee ku jira buugaagta iyo sheekooyinka.