If you are looking for the most authoritative "papers" or guides, these three are essential:
The "gold standard" for this is the official documentation by SCS Software regarding the implementation. This is the definitive technical resource that replaced the old .ogg overwrite method and is what every "solid" modder uses today. The Core Technical Resources ETS2 Create sound mods
If you're writing about this or starting a project, focus on these technical pillars: If you are looking for the most authoritative
This is the official technical manual. It explains the project structure, how to use the SCS FMOD template, and how the game engine communicates with sound events. It explains the project structure, how to use
Finding a formal academic "paper" on creating sound mods for Euro Truck Simulator 2 (ETS2) is tricky because most of the knowledge lives in developer documentation and community wikis rather than scientific journals.
You no longer just swap files. You create a .bank file that contains the logic for how sounds pitch-shift and cross-fade based on game telemetry.