Hi, does somebody know something about sound modding!?

I'm been trying to edit and add some drama to this sound "Helm,MC_CR_SO_01_A.ogg" which is the sound for the activate battle stations dialogue when you go talk to the Executive Officer.
This is making me crazy! My new boosted up version works beatifully (I attached it to the F7-Alarm shortcut) when I'm up in the deck, but when I go down, I can't hear the sound! I can see the Chief moving his lips but no sound. I changed the ogg file to wav and edited it and changed it back to ogg again. All the bitrates and codecs should be right but no sound! I tried using the unedited version of the "Helm,MC_CR_SO_01_A.ogg" and it works well both inside and outside of the sub, but when I edited it, it only works outside.
What does this mean?! Is it just some audio mod soup thing or something else? I tried to disable all the other audio mods, but it didn't help. I really don't know these things so well so that if you can offer just a tiny bit of knowledge, it helps!
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Okay, things have cleared a bit already. It seems that SH doesn't like my converted files. I tried using ogg-files from SH4 speechpacks and they worked fine. So my question is how to edit ogg-files so that the game still accepts them? What are the specifications, mono-stereo, bitrate, codecs, how do you do it?