Hello. Sorry for the dalay. Here's what I found.
When I check the coords I remember This was the capture He send to me related to that. Related to the audio with the coords, I didn't even remember that, i guess he use a image to audio program or something.
Like something extra, even if I create the Itchio page and everything else, He have access to this page. (You can share a Itchio page with some other person, who can be an editor).Its "funny", cause' that page with the MP3 you found wasn't put it be me, but him. I discovered a few days after.
Btw, on the street view you also can find this men
I don't have a freaking idea who him is, but my "friend" call him Tolga. He invented that name though.
I don't have anything more relative about this to say. But if you want to ask something, here I am.