v21.54

Minor adjustment to trailer brace rotation sound for lifting trailer leg.
Improved consistency for trailer brace rotation sound volume for the reefer trailer sound addons.
Optimizations for sound files without quality loss.

v21.53

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

v21.52

1 new default air brake sound variant, also applied to AI traffic trucks.

v21.51

Sound of tire whine from the exterior view is now also simulated when you look outside the window at high speeds.
Improved low-range of open window wind sounds.
Increased mid-range of sleeper line sound dependent on current speed.
Reduced crossfade duration for sleeper line sound.

Updated mod description

v21.50

Tweaked high speed tire sound (interior view).
Improved volume curves for window wind sounds.
Increased mid-range of sleeper line sound.

v21.49

Quietened interior tire sound for asphalt and sleeper line terrains.
Improved open window experience with better sound mix and quieter wind.
Improved fall-off for Boeing 737 flyby sound.

v21.48

Improved air brake sounds can now sometimes be heard when any bus or truck in AI traffic comes to a stop.
Replaced the air gear sound for AI traffic trucks. It can sometimes be heard when the AI traffic truck changes gear.
Replaced 1 default air brake sound effect.
Added 1 default air brake sound effect.
Refined engine slowdown sound for the MCI MC-12 in AI traffic. [ATS edition]
Removed high RPM sounds for revs that don't seem to be reached at all from the MCI MC-12 in AI traffic. [ATS edition]
Quietened Boeing 737 taxiing sound in scenarios where there are multiple planes taxiing in the same airport.
Reduced range of Boeing 737 taxiing sound.
Optimizations for sound files without quality loss. [ATS edition]

v21.47

New version of trailer brace rotation sounds.
3D positioned trailer brace rotation sounds.
Engine sounds added for the Mercedes-Benz C-Class (W204 2008) in AI traffic.
Minor sound mix tweaks for default AI car tire sounds.
Optimizations for sound files without quality loss.

v21.46

Added 1 new sound variant for when coupling trailer.
3D positioned and enhanced the trailer coupling sounds.
Engine and horn sounds added for the Honda Accord (8th generation) in AI traffic.
Engine and horn sounds added for the Toyota Prius (XW30 generation) in AI traffic. [ATS edition]
Horn sound added for the Audi A6 (C6 generation) in AI traffic.
Minor sound mix tweaks for the MCI MC-12 in AI traffic. [ATS edition]
Optimizations for sound files without quality loss.