That's indeed interesting. Sad, that we seem to do the same work over and over again just because this thread has already nearly 10.000 posts and no one is going to read it entirely.
But what should we do with this information, combined with the hint by frontier, that we need no audio editing tools? All that is not decryptable - if it is such a message - without such tools.
I believe they meant that we don't need to edit the audio to make it decryptable. In-universe, that would mean that you don't need special equipment to make sense of it, the intended recipients would be expected to decrypt it just by hearing alone. Which makes it Morse-like: a skilled listener can understand it without having to process it with specialized equipment.
Also, judging by how fast the chittering, how it's not binary and how short the pauses are, I'd believe that the aliens' hearing is better than ours.
If FD have given all the hints they can give, and have stopped them spawning - doesn't it kind-of imply that everything we need to solve the 'mystery' is already out there/here-or else surely we'd still be getting our hands on them.
It might be that they've just set the convoys to spawn as rarely as before: Michael Brookes did originally say that they are exceedingly rare. Yet on that one Monday, plenty of people found them. My guess is that they upped the chance to what they still believed to be slight, then when plenty of people got their hands on some, they changed their minds and quickly lowered the chance back.
Of course, this is just a theory. I have no evidence for it: for all we know, they might as well have removed the UA spawns altogether. But even if we still have everything we should need, why would they want to exclude others from getting more data too?
That's my proposition; The message in the chittering is a (stylised) morse encoding of the nearest celestial body. I believe messages will be consistent with the nearest celestial body.
Unfortunately, I can't find the post I made about this. In that, I broke down the signal for "ASTER" as it was the clearest of all available samples. While I didn't put the effort into representing samples other than Aster at the time, listening to other samples (Like Ross 154, He Bo etc.) I could roughly (but far from perfectly) determine the "symbols" in those samples too.
Again, this wasn't well received. The task I was set by opponents to this idea was to "decode" some other recordings, whose location was not mentioned; This was out of my capability, frankly. It's heavily stylised, and without a "word" to go off, I couldn't pick where characters start and stop. I also found some other recordings whose claimed recording locations were dubious. This is why I never followed through with the proof asked of me at the time, I didn't have the time or space or enough reliable data to achieve something I'd happily call a proof.
But I am happy to call this a proposition.
PS: I also propose that the loud "purrs" when the UA is "inactive" (not lit up) are just random, and idling. This aspect of them was very thoroughly looked at. For a corollary, I noticed people who did some recordings using asset replacement, while it went through the lit/unlit cycle, the chittering was absent from those recordings, while the "purrs" remained. This suggests to me the purrs are just "noise".
Oh, I also missed your post, even though it's very similar to my working theory. I believe the main problem is that even if the chittering is a non-binary-based Morse-like code, then there are still only a few characters in it, which makes it quite difficult to decrypt their meaning. I don't believe that the signal around Aster would mean "ASTER", since it would both be too short for that, and the signal around Ross 154 (the star itself) is too similar. I still find it the most likely theory that the artefacts are sending location data,
but in that case, it's probably not the system name, just information about the nearest stellar body. (Probably its position within the system, maybe its type.) Just like you said. But to be able to test even this, we have too few recordings (I really shouldn't have lost my UA) and too short signals in those chitterings.
I just think key is reproducing a consistent message, as I say I'm not sure if weve been able to do that yet, I'm thinking no?
Does anyone know if a UA dropped in a given area repeats it's binary message after a given time, ie does it loop?
As far as I know, the UA-s didn't repeat their purrs within the five minutes they'd broadcast before they expire. They did, however, repeat the same chittering throughout their lifetime. Given this, and that the chittering appears to be location-specific, in my opinion it's more worth looking into.