Cool!
Personally, I go into battle to the strains of Carmina Burana, or something equally stirring. I haven't played about with the in-game sound files, I just use the gramophone. One thing I must test is whether, or not, the DDs detect you easier if you have the gramophone playing - Remember in Hunt For Red October that the sonar-guy aboard the US sub heard "singing" just before Red October engaged the caterpillar drive and disappeared?