Not the OP, but I have the same issue. After installing the War Mod Gun Sounds and War Mod Engine Sounds packs, my crew voices stop working. Nothing heard in battle, and if I click the "Test" button for crew voices in settings, no sound plays either. I've verified that I'm running the correct speaker settings (ie. not accidentally having surround selected while only having stereo speakers), and the issue only starts happening after I install the sound mods and do the required sound bank restart. Had the perfect opportunity to test this, as I ALT-F4'd out of the game to reinstall the mods after dying in a battle, and it initially loaded me back into the battle where the crew voice worked just fine. Restart to finish installing the mod, no more crew sounds. Logs attached.
Aslains_WoT_Logs.zip