, ▁and ▁in ▁which ▁the ▁emphas is ▁is ▁on ▁continu ity ▁and ▁a ▁sense ▁of ▁line . ▁Among ▁his ▁ensemble ▁pieces , ▁" J igs aw " ▁and ▁" Note lette " ▁were ▁requested ▁and ▁performed ▁by ▁S ounds ▁Pos itive , ▁while ▁" Z ig z ag " ▁was ▁requested ▁and ▁performed ▁( including ▁a ▁broadcast ▁on ▁Radio ▁ 3 ) ▁by ▁Cambridge ▁New ▁Music ▁Play ers ▁( now ▁known ▁as ▁" New ▁Music ▁Play ers ". ▁His ▁" P iano ▁T rio " ▁( the ▁first ▁of ▁three ▁works ▁for ▁the ▁medium ) ▁was ▁originally ▁requested ▁and ▁performed ▁by ▁London ▁New ▁Music ▁and ▁became ▁his ▁most ▁widely ▁played ▁work , ▁taken ▁up ▁by ▁three ▁other ▁groups ▁and ▁broadcast ▁twice ▁in ▁different ▁performances . ▁Jack ' s ▁first ▁two ▁string ▁quart ets ▁were ▁played ▁and ▁broadcast ▁by ▁The ▁Smith ▁Quart et , ▁and ▁the ▁third , ▁fourth , ▁fifth ▁and ▁sixth ▁recorded ▁by ▁the ▁Ar d itt i ▁Quart et ▁for ▁the ▁Deux - E lles . ▁Of ▁over ▁ 5 0 ▁solo ▁piano ▁pieces , ▁many ▁have ▁been ▁performed ▁and ▁broadcast ▁by ▁Nor iko ▁K aw ai ▁and ▁I ain ▁Burn side , ▁and ▁all ▁of ▁Jack ' s ▁music ▁for ▁piano ▁du o ▁has ▁been ▁performed ▁by ▁the ▁Dan ish - based ▁du o , ▁In gr yd ▁Th ors on ▁and ▁Julian ▁Th ur ber . ▁Many ▁of ▁his ▁scores ▁are ▁lod ged ▁with ▁the ▁British ▁Music ▁Information ▁Centre ▁( B M IC ) ▁and ▁record ings ▁at ▁the