v21.81

2 new air brake sound effects added to the default air brake sound array and truck traffic air brake sound array.
New default headlight switch sound effects.
Horn sound added to the 2015 Subaru WRX STI in AI traffic. [ATS edition]
Spatial adjustments for road noise / hum of tires, and external suspension sound effects.

[ATS edition]
A detailed set of sounds added to the Mack RD in AI traffic.
It uses engine/exhaust sound samples courtesy of kriechbaum and Trayscapes, as featured in kriechbaum's Mack E6 sound mod.
It includes:
- Engine sounds.
- Exhaust sounds with longer range attenuation.
- A variety of horn sounds.
- Bonus sound effects for the Mack RD garbage truck: brake whistle and occasional compactor sound effects.

v21.80

Engine and horn sounds added to the Chevrolet Volt (2nd generation) in AI traffic. [ATS edition]
Engine sounds added to the Chevrolet Camaro (6th generation, pre-facelift) in AI traffic. [ATS edition]

v21.79

Engine sounds added to the 1979 Mercury Colony Park station wagon in AI traffic. [ATS edition]
Slight increase in sound volume of tire/road noise on asphalt.

v21.78

Horn sound added for the Volvo XC90 (1st generation, pre-facelift) in AI traffic.

Provisional approval for Sound Fixes Pack v21.77 to run on the 1.42 open beta.
Dropped support for game version 1.40 on the Steam Workshop.

v21.77 + v21.76

New debarker machine sounds. [ATS edition]
Added standalone Sound Fixes Pack variant for the English Doug [Raspy] voice navigation.

v21.75

Reworked default retarder stick sound.
Reworked default windshield wiper sounds for dry and wet conditions.
Complete rework of suspension / tire bump sounds.
Toned down the default debarker machine ambience. [ATS edition]
Removed some default prefab machinery sounds due to excessive loudness in game environment - will be reworked. [ATS edition]

v21.74

2 new suspension / tire bump sounds added.
Small enhancement for the fuel cap twisting sounds for after refuelling.

v21.73

Replaced the default low air warning sound.

v21.72

Improved sound mix for driving over grass.
Optional feature: Switched Driver Alert Support sound to the one from a modern Peterbilt. [ATS edition]