I see a lot of claims on here about auditory memory. I have to say, it's kind of striking how reductive it is. It's important to recognize that every person remembers things differently. Like, literally differently. Not that we remember the same events in different ways, but that we process and store the memories themselves differently from one another. That's why some people can easily remember names or dates, and others can't remember a name but could tell you what someone was wearing when they met for drinks five years ago. I know a person with exceptional episodic memory, who can recall exact orders of events on particular days years in the past, including what the weather had been like that day, what she was wearing, and who was in the room (vs present but in another room nearby) when a particular thing happened.
I often can't remember why I walked into another room, or what I'm supposed to be doing tomorrow at 10am, but I can weirdly remember the fine technical detail of an IT configuration decision that we made at work 7 or 8 years ago, including the specifics, and sometimes even what password was associated with the service account used on the piece of gear. So I think it's unfair to say that "human beings are bad at auditory memory" when it's very possible that three different people will have wildly different levels of auditory memory, some of them abysmal and others less so. Are human beings generally good at that? Maybe not, but it's also not something that's scientifically super well understood on either end of that chain (fine sensory perception or memory storage and recall of it), so blanket claims aren't generally useful. Some people are colorblind, but that doesn't prevent other people from having exceptionally fine color perception, particularly if they have training in color theory. We're all different.