ˌɔn ðɪs θɹˈiːjˈɪɹ sˈoʊdʒɜːn, ðeɪ pɹədˈuːst tˈuː mˈeɪdʒɚ wˈɜːks: ˈɔːɹɡæst aɪ ænd ɹˌoʊmən tˈuː, pɚfˈɔːɹmd ɪn nˈaɪntiːnhˈʌndɹɪd sˈɛvənti wˈʌn æt ðə ʃˈɜːɹæz ˈɑːɹts fˈɛstɪvəl ɪn ɪɹˈæn ɪnðɪ ɐtʃˈiːmənˌɪd ɹˈuːɪnz ʌv pɜːsˈɛpəlˌɪs ænd nˈækʃˈiː ɹˈɑːstæm, ænd ðə kˈɑːnfɹəns ʌvðə bˈɜːdz, dɪvˈɛləpt ɪn wˈɛst ˈæfɹɪkə ænd kəmplˈiːɾᵻd ɪn nˈaɪntiːnhˈʌndɹɪd sˈɛvənti fˈoːɹ æt bˌiːˌeɪˈɛm ɪn bɹˈʊklɪn, nˈuː jˈɔːɹk.
On this three-year sojourn, they produced two major works: Orghast I & II, performed in 1971 at the Shiraz Arts Festival in Iran in the Achaemenid ruins of Persepolis and Naqsh-e Rostam, and The Conference of the Birds, developed in West Africa and completed in 1974 at BAM in Brooklyn, New York.