v21.6 + v21.5

2 new rain interior sound variants, courtesy of Darkcaptain.
Interior sound volume for rain now controlled by Interior sound slider.
Slight adjustments to rain interior sound volume.

v21.4

Better variety of thunder sounds, courtesy of Darkcaptain.
Added feature to make thunder sounds more loud at night.
Close thunder may now play before/after thunder sounds that are further away.

v21.3

Improved rain sound in the interior view.

v21.2

Slight reduction in interior tire sound volume.

v21.1

Reduced wind sound volume when windows are open.
Finetuning to wind sound effects.

v21.0

Restored modified sleeper line sound. Known issue: Does not work properly with Route 66 musical road currently.
1 modified suspension sound.
Reduced volume of interior view gravel sounds.
Fade-out effect for gravel sounds.

v20.66

Reduced volume of interior view gravel sounds.

v20.65

Added cooldown for air brake sounds.

v20.63

Adjusted mix for wind sound.

v20.62

English voice navigation 1.39 compatibility update.
Sound Fixes Pack voice navigations will be standalone in the dropdown menu from now on.