▁seeing ▁if ▁we ▁could ▁try ▁to ▁color ▁outside ▁the ▁lines ▁a ▁little ▁bit ▁of ▁what ▁music ▁might ▁be ▁expected ▁to ▁do ▁in ▁a ▁picture ▁like ▁that ." ▁ ▁As ▁part ▁of ▁the ▁research ▁for ▁the ▁sound track ▁the ▁two ▁were ▁given ▁access ▁to ▁previously ▁un re leased ▁F BI ▁files ▁surrounding ▁the ▁events ▁of ▁the ▁Boston ▁Mar athon ▁bomb ing ▁that ▁the ▁film ▁was ▁based ▁on . ▁ ▁Production ▁Re zn or ▁and ▁Ross ▁composed ▁the ▁entire ▁sound track ▁together ▁in ▁the ▁studio , ▁with ▁Re zn or ▁playing ▁all ▁the ▁instruments ▁and ▁Ross ▁handling ▁the ▁arrang ements . ▁They ▁worked ▁simultaneously ▁on ▁N ine ▁In ch ▁N ails ' s ▁ 2 0 1 6 ▁EP ▁Not ▁the ▁Act ual ▁Events ▁and ▁The ▁Vietnam ▁War ▁sound track ▁( 2 0 1 7 ). ▁Most ▁of ▁the ▁piano ▁and ▁live ▁strings ▁were ▁filtered ▁through ▁a ▁spe cially ▁built ▁for ▁the ▁purpose ▁device ▁which ▁consisted ▁of ▁" two ▁t ape ▁machines ▁hook ed ▁to ▁a ▁computer , ▁where ▁it ▁just ▁end lessly ▁lo cks ▁something ▁in ▁and ▁copies ▁from ▁one ▁to ▁the ▁next , ▁each ▁one ▁deg ener ating ▁another ▁time . ▁[...] ▁Le ave ▁it ▁over night ▁and ▁it ’ s ▁un recogn izable , ▁but ▁it ▁does ▁it ▁in ▁a ▁way ▁that ’ s ▁interesting , ▁that ’ s ▁warm ▁and ▁nost alg ic ." ▁About ▁ 3 0 ▁of ▁these ▁pieces ▁were ▁created ▁and ▁left ▁to ▁play ▁for ▁different ▁amounts ▁of ▁time ▁in ▁order ▁to ▁" invoke ▁the ▁sense ▁of ▁memory