When jumping thru gates, there are two audio files working, one for charge and another for engage.
In long runs, which you got to do jump after jump, the vanilla engage sound is quite anoying, due to the high volume and "thunder" effect.

This mod has an alternative version for the engage audio based on Star Trek's Enterprise B warp sound.
Also, the charge audio was drop 2.0db in order to match the volume of the new engage audio.

Installation:
The mod is basically one .PAK file to be copied in the game folder.
Place the file inside your ...\Rebel Galaxy Outlaw\PAKS folder.

To unistall, just delete the mod file.

Thank you sp00n82 for the mod tools and tutorial:
https://github.com/sp00n/rgo-lua-utils
https://github.com/sp00n/rgo-mod-helpers