Hi, here is my Rammstein inspired theme.

For the custom power on sound, move the included hello.wav
and replace original on SD/SOUNDS/your_language_pack/SYSTEM

It can also be downloaded from
https://drive.google.com/file/d/1PO_3Qcc9XaFgHK0xRPFE1qgEeb46R_9s/view?usp=sharing

Enjoy!