▁Blo om ington , ▁Indiana ▁to ▁study ▁conduct ing . ▁Jo ó ▁graduated ▁with ▁a ▁MM ▁in ▁Con duct ing ▁( Or ch est ral ▁and ▁Opera ). ▁During ▁this ▁time ▁he ▁also ▁studied ▁conduct ing ▁with ▁Ig or ▁Mar ke v itch ▁in ▁Monte ▁Carlo ▁after ▁which ▁he ▁was ▁named ▁the ▁resident ▁Music ▁Director ▁and ▁Princi pal ▁Con duct or ▁of ▁the ▁Kno x ville ▁Sym phony ▁Orchestra ▁in ▁Tennessee ▁at ▁the ▁age ▁of ▁ 2 4 . ▁J oo ▁was ▁the ▁young est ▁ever ▁Music ▁Director / Con duct or ▁of ▁a ▁metropol itan ▁or chestra ▁in ▁the ▁history ▁of ▁the ▁United ▁States . ▁ ▁During ▁this ▁time ▁he ▁guest ▁conducted ▁in ▁many ▁different ▁places ▁including ▁the ▁Netherlands , ▁Mexico , ▁and ▁the ▁US . ▁At ▁the ▁age ▁of ▁ 2 6 , ▁the ▁cultural ▁arm ▁of ▁the ▁United ▁Nations , ▁UN ES CO , ▁selected ▁him ▁to ▁conduct ▁a ▁special ▁performance ▁representing ▁the ▁United ▁States ▁in ▁Monte ▁Carlo ▁— which ▁he ▁accomplished ▁to ▁great ▁critical ▁acc laim . ▁At ▁this ▁time ▁he ▁became ▁a ▁private ▁student / conf id ante ▁of ▁the ▁Italian ▁conduct or ▁Carlo ▁Maria ▁Giul ini . ▁Next ▁he ▁became ▁the ▁Music ▁Director ▁and ▁Princi pal ▁Con duct or ▁of ▁the ▁Cal g ary ▁Phil harm onic ▁Orchestra . ▁During ▁this ▁time ▁he ▁had ▁many ▁guest ▁conduct ing ▁appearances ▁all ▁over ▁the ▁world , ▁with ▁many ▁leading ▁orch est ras ▁of ▁the ▁world , ▁including ▁the ▁London ▁Sym phony ▁Orchestra , ▁The ▁Phil harm onia ▁Orchestra ▁of