I used sound packs for Silent Hunter III,and it really added to the virtual experience.Lili Marlene,Horst Wessel,Alte Kameraden,Westerwald,
Langen Kerls,SS Leibstandarte Adolf Hitler Badenweiler Marsch,and Ich Hatt' einen Kameraden,were amongst my favorites while traversing the Atlantic otw to the USA area of operations.I have Silent Hunter IV as well,but I don't use the sound packs for it,as I don't really care for the big bands that well.
IronDog