Orignial sound sample by avakas @ freesound.org (https://freesound.org/people/avakas/sounds/187115/ as of Nov 2020)
released under CC BY 3.0 license (https://creativecommons.org/licenses/by/3.0/).

Shortend, edited to loop and converted to mono in .ogg format by Mr.Floppy to use with the Cube Engine (assault.cubers.net).