▁with ▁a ▁" comp an ion ▁ensemble ", ▁the ▁Philadelphia ▁Young ▁Art ists ▁Orchestra ▁( PY A O ), ▁the ▁lower ▁version ▁of ▁P Y O , ▁which ▁was ▁established ▁in ▁ 1 9 9 6 , ▁and ▁Bra vo ▁Br ass , ▁a ▁br ass ▁ensemble , ▁which ▁was ▁founded ▁in ▁ 2 0 0 3 . ▁In ▁ 2 0 0 7 , ▁another ▁group , ▁Philadelphia ▁Region ▁Youth ▁String ▁Music ▁( PR Y SM ) ▁was ▁added ▁to ▁the ▁program ▁as ▁a ▁string ▁music ▁education ▁ensemble . ▁ ▁In ▁ 2 0 1 6 , ▁a ▁new ▁companion ▁ensemble , ▁the ▁P Y MO , ▁or ▁Philadelphia ▁Young ▁Mus icians ▁Orchestra , ▁was ▁introduced . ▁ ▁Philadelphia ▁Youth ▁Orchestra ▁and ▁Philadelphia ▁Young ▁Art ists ▁Orchestra ▁P Y O ▁was ▁conducted ▁by ▁Joseph ▁Prima vera ▁for ▁ 5 1 ▁years , ▁until ▁ 2 0 0 5 ▁when ▁he ▁retired ▁from ▁the ▁position . ▁ ▁The ▁or chestra ▁is ▁now ▁conducted ▁by ▁Ma estro ▁Louis ▁Sc ag l ione . ▁Ma estro ▁Prima vera ▁was ▁the ▁music ▁director ▁la ure ate ▁until ▁he ▁died ▁in ▁ 2 0 0 6 . ▁M embers ▁of ▁both ▁orch est ras ▁are ▁chosen ▁through ▁highly ▁compet itive ▁aud itions ▁held ▁in ▁June ▁and ▁September ▁of ▁every ▁year . ▁P Y O ▁holds ▁around ▁six ▁concert s ▁a ▁year ▁while ▁P Y A O ▁holds ▁around ▁four ▁a ▁year . ▁The ▁orch est ras ▁have ▁played ▁music ▁by ▁such ▁compos ers ▁as ▁Gustav ▁Mah ler