This is discussing the biology of the brain and not the cognition of it. It’s important to remember that our brain is nothing more than neurons that either fire or don’t fire. The neurons don’t have consciousness themselves. You can identify a “ck” sound as different from a “oh” sound because different neurons pathways fire when they detect different audio signals as they hit your ear. That means each sound goes down a different pathway in your brain. Those pathways are NOT exactly the same length which means they may not hit your “audio processing cognition areas” in the correct order.

This is exploring the mechanism the brain uses to know the order of the syllables heard in spite of them going through different pathways. They found a neurological “buffer” that seems to be firing in patterns that would support a time stamp system so the brain can keep track of the word of sounds it heard to form them together as words.