▁J omm elli ▁wrote ▁cant at as , ▁or ator ios ▁and ▁other ▁sacred ▁works , ▁but ▁by ▁far ▁the ▁most ▁important ▁part ▁of ▁his ▁output ▁were ▁his ▁oper as , ▁particularly ▁his ▁opere ▁serie ▁of ▁which ▁he ▁composed ▁around ▁si xty , ▁several ▁with ▁libre tt i ▁by ▁Met ast as io . ▁These ▁t ended ▁to ▁concent rate ▁more ▁on ▁the ▁story ▁and ▁drama ▁of ▁the ▁opera ▁than ▁on ▁flash y ▁technical ▁displays ▁by ▁the ▁sing ers , ▁as ▁was ▁the ▁norm ▁in ▁Italian ▁opera ▁at ▁that ▁time . ▁He ▁wrote ▁more ▁ensemble ▁numbers ▁and ▁ch or uses , ▁and , ▁influenced ▁by ▁French ▁opera ▁compos ers ▁such ▁as ▁Jean - Ph ili ppe ▁R ame au , ▁introduced ▁bal lets ▁into ▁his ▁work . ▁He ▁used ▁the ▁or chestra ▁( part icular ly ▁the ▁wind ▁instruments ) ▁in ▁a ▁much ▁more ▁prominent ▁way ▁to ▁dep ict ▁what ▁was ▁going ▁on ▁in ▁the ▁story , ▁including ▁pass ages ▁for ▁or chestra ▁alone , ▁rather ▁than ▁cons ign ing ▁it ▁to ▁merely ▁support ▁for ▁the ▁sing ers . ▁From ▁H asse , ▁he ▁learned ▁to ▁write ▁orch estr ally ▁accompanied ▁rec it atives ▁rather ▁than ▁just ▁" se cco " ▁rec it atives ▁for ▁voice ▁and ▁continu o ▁( main ly ▁har ps ich ord ). ▁His ▁re forms ▁are ▁sometimes ▁regarded ▁as ▁equal ▁in ▁importance ▁to ▁Christoph ▁Will ib ald ▁Gl uck ' s . ▁ ▁Chamber ▁music ▁Son ata ▁in ▁C ▁for ▁Organ ▁ 4 - Hand s ▁( c