This is actually the occupation from the polyphase filters, that are all-pass filters and only modify the period. The phase marriage amongst The 2 polyphase filters in this example is these that it will compensate for that added "twist" so the section in between the desired small frequency components are https://boyspginsector15part1gurgaon.blogspot.com/2025/07/clean-and-secure-girls-pg-in-sector-14.html