 Nyorai kupfuurira kweiyi ndima - Muna 1968, Berio akapedza O King basa iro riripo mumashanduro maviri: imwe yenzwi, nyere, clarinet, violin, cello uye piano, imwe yenzwi masere uye orchestra. Chidimbu chacho ndechokuyeuka Martin Luther King, Jr., uyo akanga aurayiwanguva pfupi isati yaumbwa. Mariri, inzwi s rinotanga kuridza mavhawero, uyezve ma consonants anoumba zita rake, achingoasunga pamwechete kuti ape zita rake zvizere mumatare ekupedzisira. Shanduro yeorchestra ye O King yaive, nguva pfupi yapera kupedzwa kwayo, yakabatanidzwa mune ingangove iri basa rakakurumbira raBerio, Sinfonia 196769, yeorchestra uye manzwi masere akasimbiswa. Manzwi haashandiswi nenzira yechinyakare yekare; kazhinji kazhinji haafungi zvachose, asi anotaura, anozevezera uye anoshevedzera. Chikamu chechitatu chiunganidzwa chemashoko akatorwa muzvinyorwa uye mumhanzi. A-Ronne 1974 yakaiswa pamwe chete nenzira yakafanana, asi nechinangwa chakanyatsojeka pane inzwi. Pakutanga rakanyorwa sehurongwa hweredhiyo hwevatambi vashanu, uye rakagadziridzwa muna 1975 kune vaimbi vasere uye chikamu chekiyibhodhi chisingasarudzwe. Basa iri nderimwe remabasa akawanda aakaita nemunyori Edoardo Sanguineti, uyo akapa chinyorwa chakazara nezvakataurwa kubva kunzvimbo dzinosanganisira Bhaibheri, T. S. Eliot naKarl Marx. 