The sound mixing was very deliberate artistic expression that is somewhat controversial. See https://www.indiewire.com/2020/11/christopher-nolan-directors-compl

The sound mixing was very deliberate artistic expression that is somewhat controversial. See https://www.indiewire.com/2020/11/christopher-nolan-directors-complain-sound-mix-1234598386/ https://www.indiewire.com/2020/11/christopher-nolan-director...