Creepy sound files found in the Half-Life 2 Beta

EDIT: The name of the file is "Trans6"

Judica-Cordiglia brothers
https://en.wikipedia.org/wiki/Judica-Cordiglia_brothers

Original sound file
https://www.youtube.com/watch?v=9Sgc1I9sjfc

More info about it
http://www.svengrahn.pp.se/trackind/Torre/TorreB.html

Видео Creepy sound files found in the Half-Life 2 Beta канала vladix123