4 , ▁ 9 , ▁ 1 3 , ▁ 1 4 ), ▁vocal ▁production ▁( tra cks ▁ 4 , ▁ 5 ), ▁vocal ▁engineering ▁( track ▁ 8 ) ▁ ▁Rob ▁Ghost ▁– ▁engineering ▁assistance ▁( tra cks ▁ 4 , ▁ 9 ), ▁mixing ▁( tra cks ▁ 1 3 , ▁ 1 4 ), ▁production ▁( track ▁ 1 3 ) ▁ ▁Matt ▁Beck ley ▁– ▁vocal ▁production ▁( tra cks ▁ 1 , ▁ 1 5 ), ▁engineering ▁& ▁mixing ▁( track ▁ 1 5 ) ▁ ▁Simon ▁French ▁– ▁engineering ▁assistance ▁( tra cks ▁ 4 , ▁ 1 3 , ▁ 1 4 ), ▁studio ▁assistance ▁( track ▁ 9 ) ▁ ▁Joe ▁Pr ing le ▁– ▁engineering ▁assistance ▁( tra cks ▁ 9 , ▁ 1 3 , ▁ 1 4 ), ▁studio ▁assistance ▁( track ▁ 4 ) ▁ ▁Mike ▁Del ▁Rio ▁– ▁production , ▁programming ▁& ▁additional ▁vocals ▁( track ▁ 1 ) ▁ ▁Steve ▁Hamm ons ▁– ▁engineering ▁( tra cks ▁ 3 , ▁ 1 1 ), ▁additional ▁production ▁( track ▁ 3 ) ▁ ▁Fred dy ▁W ex ler ▁– ▁production , ▁vocal ▁production ▁& ▁background ▁vocals ▁( track ▁ 8 ) ▁ ▁T oby ▁G ad ▁– ▁production , ▁programming ▁& ▁mixing ▁( track ▁ 1 2 ) ▁ ▁Am mo ▁– ▁production , ▁programming ▁& ▁instruments ▁( track ▁ 1 5 ) ▁ ▁A . C . ▁– ▁additional ▁production , ▁programming ▁& ▁instruments ▁( track ▁ 1