Alright CMDRS,
as promised I took a shot at the recordings from yesterdays night.
I am no scientist, codebreaker or whatsoever, just a gamer

I recorded 56mins of the signal and did several tests.
The recording was limited due to my SRV exploding (marked it in the signal), as I was tabbed out of the game and didn't notice it.
I took some further recordings later to determin the signals origin.
But read for yourself:
Eric, what are you talking about?
A quick key to start with, so we are on the same page.
Obelisk status:
I noticed 2 different states for obelisks in the recording (deliberate testing):
1. Standby
- SRV is in range
- obelisks starts to light up,
- display is still off
- steady monoton noise starts
2. Active
- SRV is right in front
- obelisks is still shining
- display is on
- pulsing noise, almost like old mechanical computers starts
3. logic dictates that here is probably a 3rd state, -Offline-, but i didn't record this
You can see the 2 states here.
Notice the "carrier wave" (marked red) in both states and the pitch of frequencies.
Patterns:
1. It seems that the signal is devided in groups of signals. Every group devided by the marker.
2. I was not able to spot a reacurring group patterns.
3. The signals components itself (lines, blocks, markers) are identical throughout the recording
4. The "carrier wave" seems to be constant as well (see below)
5. Signal components do not overlay.
6. Pauses behind a marker seem not to be consistent. (ranging from secs to mins)
I made a gif to make it more visible.
Focus on the far right, the "marker" (as it seems to close every signal group) does not change, as well as the "carrier wave".
Conclusion:
1. The signal originates from Obelisks in active state.
2. The signal is probably not a sound artefact. There are too many indicators showing that it was deliberatly put there. (a carrier wave, identical components, components do not overlay)
3. The message, if there is any, is long! I caught 56mins and the patterns did not repeat. You will see there are many pauses between groups, up to 2-3mins.
Attachments:
Below you will find my converted 56min recording.
It was taken here while using the debug cam to get as near as possible:
As well as pictures of the spectrogram if you are not in the mood to open them yourself
DROPBOX WITH ALL THE STUFF
Personal Notes:
This is as far as I could come with my limited capabilities here.
I remind you: I only have a mobile connection with limited bandwith and transfer.
I will not upload any more audio! (I just can't as I'm just about to hit the limit).
There is further testing needed and if there is anything behind this then I would kindly ask other CMDRs to take some recordings and upload them.
If you can dismiss this signal/theory, then please do so and save us all alot of time.
@FD/ Michael: Please have mercy and tell us, if this is not intended so we won't follow any wrong leads
In any case I am thankfull for your time and attention.
Good luck and Fly safe CMDR!
o7