ios - A workaround for custom and "dynamic" notification sounds -

from apple documentation, can read

for remote notifications in ios, can specify custom sound ios plays when presents local or remote notification app. sound files must in main bundle of client app.

my app evolves around notifications, many other apps, , have ability add sounds later on, or @ least have kind of control on them. best scenario :

on launch, app checks sound database online , downloads updates.

but if sounds have in bundle, can't done.

i have on 400mb of sounds, , obvious sounds, app store, , that's why i'd need control user, not download sounds.

is there possible workaround can play sounds written on disk , not in bundle? or other possibility might think of can play custom push notification sound?

if of help, app works 100% online, if there solution, can server-related.

i understand i'm "no" best answer, need make sure.

thank in advance.

if app wants in app store, should follow apple documentation. say, can play sound main bundle.
, not modify main bundle dynamically. because it's encrypted.
i'm afraid not go way. suggest upload whole app app store if sacrifice sound file dynamically update feature.