Trying to find a way to specifically decrease truck's engine sound in chase camera view

[Fe]

I always enjoy driving my truck in chase camera view, but what annoyed me most is the sound of truck engine, it's a bit too loud for me.

Is there any way to decrease volume of the sound without any effect to other sound in the game? Because lowering sound effect volume will cause other sound to drop too

[Asigion]

I am sure there is a way to reduce engine sound other than decreasing sound effect volume but I think you would need to go into the game files. That I am afraid is out of my spere of kowledge and I am always hesitent to change game files in games. However, I know there are people here well qualified to give you that information if you are willing to change your game files.

In the meantime you could go back through the forums. I am sure you wouldn't be the first person who has asked this question. Or you could Google it, they often have steam discussions on subjects I wish to know.

[room217au]

To reduce the level of outside engine noise, specifically, you would need to edit the exterior script files (def\vehicle\truck\truck_name\sound\exterior_engine_type.sii) for every truck you want this change to affect.
You would need to then create a directory structure that exactly matches each scripts' original location in the def.scs file, all in a directory called "def".
You would then need to archive that directory as an .scs file and give it highest priority in your Mod Manager.

If you only want to drive a particular truck, you only need alter the .sii files for that particular truck. Including mod trucks.
If you're still reading, the external_engine_type.sii files contain these kinds of code blocks:

sound_engine_data: .e0
{
name: "/sound/truck/cat/ext/500rpm.ogg"
looped: true
pitch_reference: 600
min_rpm: 300.0
max_rpm: 1000.0
volume: 0.62
}
But you only need alter the "volume" line. Obviously a lower number is quieter.
There are quite a few of these code blocks in each engine file.
Good luck.

Afaik, there's no 'shortcut' for this.

[room217au]

If you STILL want to have a crack at it, there are other locations in def.scs that contain volumes. The retarder, for example, is controlled in a .sui file somewhere else.
But luckily, that .sui file is global. There's only one :)
Anyone with even a small knowledge of scripting blocks can do it. I could in about an hour, but I have NO idea exactly HOW quieter you want those engines :D

[Fe]

thanks for all reply, I was hoping it would be simple task like editing a number in .ini files

@room217au appreciated for detailed answer, I'll take this weekend to decide if I want to invest my time for ETS2 modding or not, I've tried to mod many games in the past but only success one game so far.
All I want is the engine volume to be dropped 50%

[room217au]

It's rather finnicky (ie. takes a fair amount of tweaking volumes) because most of the time is taken up by adjusting stuff after you actually edit all the files initially.
Engine RPM when lessened in volume will make the turbo, for example, appear louder. Lessening the volume for the turbo then, may make it inaudible.
In addition to all that, making the truck sounds quieter will, like the turbo, make the environment sounds (other traffic and city sounds etc) appear louder and these volumes are found in .sii files in the base.scs file. That's a little more tricky.