Reposted by popular demand, sorry about the formatting issues:
So, instead of speeding up the audio to listen for Highs and Lows, (which I believe is clouded by the erratic 'heart beat' sounds it makes, causing there to be no discernible pattern) I listened to it at plain old 1X, and I hear a pattern of 7 notes. First four (ending with the iconic foghorn note), then three. These repeat, without fail, every time. AND they coincide with when the UA 'lights up'.
Now, I'm not fully convinced that the Thargoids 'want' us to find them, because if they knew our culture they would just emit a message in english (for example), but for now let's assume that for simplicity, we can use all our human tools to decode it.
I took the seven notes and corresponded them to notes on a keyboard.
The first is D (27) - A (34) - D (27) - D (3)
The second is F (30) - C# (2) - D# (28)
I'm trained in music, but by no means a tone expert so I would love for someone to check me. This results in seven alpha notes, or 12 numeric digits. These twelve digits could be used to make a 3-axis coordinate system, with 4 digits each. You would result in (27.34, 27.33, 02.28)
Just one of the many ways to interpret the sound, but I believe looking at the notes themselves is more reliable than the binary system of highs and lows, because there is a definitive pattern, and it's not just high and low, there are multiple notes being used.