, ▁Lor is ▁T je kn avor ian , ▁etc . ▁directed ▁the ▁or chestra . ▁Since ▁its ▁foundation , ▁the ▁or chestra ▁has ▁performed ▁most ▁of ▁the ▁classical ▁re per toire . ▁Many ▁famous ▁artists ▁as ▁David ▁O ist rach , ▁S vi atos lav ▁Rich ter , ▁M st is lav ▁Rost rop ov ich , ▁David ▁G ering as , ▁Bor is ▁Bere z ov sky , ▁Ian ▁Gill an ▁have ▁appeared ▁with ▁the ▁or chestra . ▁Ar am ▁Kh ach atur ian , ▁D mit ri ▁Kab ale v sky ▁and ▁others ▁have ▁conducted ▁their ▁works ▁at ▁the ▁AP O . ▁More ▁than ▁ 3 0 ▁CD s ▁have ▁been ▁released ▁with ▁the ▁AP O ▁record ings . ▁ ▁Princi pal ▁conduct ors ▁Edu ard ▁Top ch jan ▁( 2 0 0 0 – ) ▁Lor is ▁T je kn avor ian ▁( 1 9 9 9 – 2 0 0 0 ) ▁M ika el ▁A vet is yan ▁( 1 9 9 8 – 1 9 9 9 ) ▁Lor is ▁T je kn avor ian ▁( 1 9 8 9 – 1 9 9 8 ) ▁V ah agn ▁Pap ian ▁( 1 9 8 7 – 1 9 8 9 ) ▁Martin ▁N ers iss ian ▁( 1 9 8 6 – 1 9 8 7 ) ▁Rafael ▁Mang ass arian ▁( 1 9 8 5 – 1 9 8 6 ) ▁Val ery ▁Ger g iev ▁( 1 9 8 1 – 1 9