Sounds of Weather (Rain and Thunder)

[LZScout 5]

I use Active Sky P3D with Prepar3d v4.5. When I start Active Sky, I hear the “thunder” sound on startup. But when I’m flying in rain, lightning, and thunderstorms, I never hear any storm related sounds. Does Active Sky P3d generate storm sounds? I have asked others and they say yes but their setups may have other programs generating these sounds. If I should be hearing these sounds, what settings should I be looking at?