- play ers - ties , ▁percentage ▁of ▁sets ▁won , ▁or ▁of ▁games ▁won ; ▁ 5 ) ▁Ste ering ▁Committee ▁decision . ▁ ▁See ▁also ▁ATP ▁World ▁Tour ▁Final s ▁appearances ▁ ▁References ▁ 1 9 7 6 ▁Masters - Sing les ▁ ▁Singles <0x0A> </s> ▁Or fe on ▁( T urk ish : ▁Or fe on ▁O da ▁Kor os u ) ▁is ▁a ▁chamber ▁cho ir ▁established ▁in ▁ 1 9 9 4 ▁in ▁Turkey . ▁Its ▁found ers ▁are ▁amateur ▁ch or ister s ▁from ▁different ▁prof essions , ▁who ▁had ▁previously ▁s ung ▁in ▁various ▁poly ph onic ▁cho irs ▁and ▁participated ▁in ▁national / intern ational ▁festiv als ▁and ▁compet itions . ▁ ▁The ▁Or fe on ▁Chamber ▁Ch oir ▁a ims ▁to ▁present ▁performances ▁of ▁distinguished ▁products ▁of ▁cho ir ▁music ▁from ▁different ▁periods ▁and ▁regions . ▁Another ▁goal ▁is ▁to ▁promote ▁poly ph onic ▁cho ir ▁music ▁in ▁different ▁regions ▁of ▁Turkey . ▁The ▁Ch oir ▁also ▁includes ▁the ▁works ▁of ▁Turkish ▁compos ers ▁in ▁their ▁international ▁concert ▁programs ▁so ▁as ▁to ▁familiar ize ▁aud ien ces ▁all ▁over ▁the ▁world ▁with ▁Turkish ▁ch oral ▁music . ▁ ▁The ▁mult iling ual ▁re per toire ▁of ▁Or fe on ▁Chamber ▁Ch oir ▁ranges ▁from ▁works ▁of ▁medieval ▁times ▁and ▁the ▁Renaissance , ▁to ▁those ▁of ▁Class ical ▁and ▁Rom antic ▁periods ▁as ▁well ▁as ▁contemporary ▁products , ▁including ▁compos itions ▁by ▁the ▁Turkish ▁Five ▁and ▁the ▁following ▁gener ations ▁of ▁Turkish ▁compos ers .