▁front ed ▁by ▁the ▁film ' s ▁director , ▁Bo ots ▁R iley . ▁R iley ▁said ▁he ▁started ▁working ▁with ▁the ▁T une - Y ards ▁in ▁" ear ly ▁ 2 0 1 5 " ▁to ▁create ▁the ▁film ' s ▁score , ▁with ▁demo ▁tracks ▁already ▁available ▁before ▁the ▁script ▁was ▁complete , ▁and ▁before ▁the ▁start ▁of ▁principal ▁phot ography . ▁R iley ▁said ▁he ▁was ▁attract ed ▁to ▁Gar bus ' s ▁voice , ▁and ▁to ▁the ▁band ' s ▁" un orth odox ▁use ▁of ▁per cussion ▁and ▁vocal ▁layer ing ." ▁ ▁M embers ▁M err ill ▁Gar bus   – ▁vocals , ▁uk ule le , ▁per cussion ▁( 2 0 0 6 – present ) ▁N ate ▁B ren ner   – ▁bass ▁guitar ▁( 2 0 0 9 – present ) ▁ ▁Tour ing ▁members ▁Ham ir ▁At wal   – ▁per cussion ▁( I ▁can ▁feel ▁you ▁cre ep ▁into ▁my ▁private ▁life ▁tour ) ▁No ah ▁Bern stein   – ▁sa x oph one ▁( wh ok ill ▁tour ) ▁H ale y ▁De k le   - ▁per cussion , ▁vocals ▁( N ik ki ▁N ack ▁tour ) ▁K ase y ▁Kn ud sen   – ▁sa x oph one ▁( wh ok ill ▁tour ) ▁Jo ▁Lam pert   – ▁vocals ▁( N ik ki ▁N ack ▁tour ) ▁D ani ▁Mark ham   – ▁per cussion , ▁vocals ▁( N ik ki ▁N ack ▁tour ) ▁Matt