These are the reworked Kriechbaum’s engine sounds along with Alexey’s P other game’s sounds (e.g. AI, environment, etc). I adjusted all the loudness, pitches, and frequencies of engine sounds as well as environmental sounds to my liking. Made cabin sticks sounds louder, took best quality sounds for air brakes, etc. Changed some jake brakes, made them louder, added few airhorn sounds…

Engines list:
Cummins ISX
Paccar
Cummins 444
Cummins N14
Cummins N14 Celect Plus
CAT C15
CAT C15 Straight Pipe
CAT 3406E

This mod contains 2 files. Make sure the Improved Environment Sound is above sound_1.4 in your mods list. I still call it a WIP because Kriech constantly adds new engines to his collection. The mod seems to work OK with all the default trucks!

WARNING! This mod may be incompatible with other sound mods or truck mods with its own sounds!

Credits:
– Kriechbaum, – Alexey P, – Audacity, – Sound Fixes pack team: Drive Safely, Ludmilla and Katixa/Irreo, Balamut, AlexeyP, nIGhT-SoN, – odd_fellow