anned ▁more ▁than ▁fifty ▁years . ▁ ▁Early ▁career ▁Comple ting ▁his ▁musical ▁studies ▁with ▁hon ours ▁at ▁ 1 4 ▁years ▁of ▁age , ▁Felix ▁A yo ▁continued ▁to ▁study ▁in ▁Paris , ▁S ien a ▁and ▁Rome . ▁He ▁was ▁a ▁founder ▁of ▁the ▁ensemble ▁I ▁Mus ici , ▁and ▁remained ▁their ▁first ▁viol in ▁solo ist ▁for ▁six teen ▁years . ▁In ▁ 1 9 7 0 ▁he ▁formed ▁the ▁Quart etto ▁Be eth oven ▁di ▁Roma , ▁which ▁is ▁generally ▁considered ▁to ▁be ▁one ▁of ▁the ▁best ▁string ▁quart ets ▁and ▁piano ▁quart ets ▁in ▁existence . ▁ ▁Perform ances ▁He ▁has ▁played ▁in ▁the ▁most ▁important ▁the at res ▁of ▁the ▁world : ▁Car neg ie ▁Hall , ▁Berliner ▁Phil harm onie , ▁Teatro ▁Col ón , ▁Musik verein , ▁Teatro ▁Real , ▁La ▁Scala , ▁Sydney ▁Opera ▁House , ▁Con cert geb ouw , ▁and ▁the ▁Acc adem ia ▁di ▁Santa ▁Cec ilia . ▁As ▁a ▁solo ist ▁he ▁has ▁played ▁with ▁a ▁number ▁of ▁important ▁sym phony ▁orch est ras , ▁including ▁those ▁of ▁Madrid , ▁C open hagen , ▁Buenos ▁Aires , ▁Tokyo , ▁and ▁with ▁the ▁Australian ▁Chamber ▁Orchestra , ▁the ▁Berlin ▁Kam mer or chester , ▁the ▁Tokyo ▁String ▁Ens emble , ▁and ▁the ▁V irt u osi ▁di ▁Roma . ▁ ▁Te aching ▁A yo ▁has ▁taught ▁at ▁the ▁Acc adem ia ▁Nazionale ▁di ▁Santa ▁Cec ilia , ▁and ▁has ▁held ▁master ▁classes ▁in ▁Canada , ▁Australia , ▁the ▁USA , ▁Den