cert ante ▁for ▁Fl ute , ▁O bo e , ▁Horn , ▁Bass oon , ▁and ▁Orchestra ▁from ▁ 1 7 7 8 ) ▁ ▁These ▁were ▁not ▁Moz art ' s ▁only ▁attempts ▁at ▁the ▁genre ; ▁a ▁few ▁other ▁fragment ary ▁works ▁were ▁also ▁composed ▁around ▁the ▁same ▁time , ▁though ▁not ▁completed . ▁ ▁S inf onia ▁Con cert ante ▁for ▁Vi olin , ▁Vi ola , ▁C ello ▁and ▁Orchestra ▁in ▁A ▁major , ▁K . ▁ 3 2 0 e ▁( An h . ▁ 1 0 4 ) ▁( c . ▁ 1 7 7 9 , ▁fragment ) ▁ ▁S inf onia ▁Con cert ante ▁for ▁P iano , ▁Vi olin ▁and ▁Orchestra ▁in ▁D ▁major , ▁K . ▁ 3 1 5 f ▁( An h . ▁ 5 6 ) ▁( 1 7 7 8 , ▁fragment ) ▁ ▁Other ▁▁ ▁Con cer to ▁for ▁Trump et , ▁K . ▁ 4 7 c ▁( 1 7 6 8 , ▁lost ) ▁ ▁C ello ▁Con cer to , ▁K . ▁ 2 0 6 a ▁( 1 7 7 5 , ▁lost ) ▁ ▁P iano ▁music ▁ ▁Moz art ' s ▁earliest ▁composition ▁attempts ▁begin ▁with ▁piano ▁son at as ▁and ▁other ▁piano ▁pieces , ▁as ▁this ▁is ▁the ▁instrument ▁on ▁which ▁his ▁musical ▁education ▁took ▁place . ▁Al most ▁everything ▁that ▁he ▁wrote ▁for ▁piano ▁was ▁intended ▁to ▁be ▁played ▁by ▁himself ▁( or ▁by ▁his ▁sister , ▁also ▁a ▁prof