This is the task of the polyphase filters, that are all-go filters and only modify the section. The stage partnership between the two polyphase filters in this example is such that it'll compensate for that additional "twist" so that the section involving the specified reduced frequency parts are all in https://www.reddit.com/user/Alternative-End-2470/comments/1mbyceb/budgetfriendly_boys_pg_in_sector_14_gurgaon_for/