Just randomly out of the blue ArmA 3 sounds just stopped working. I used to not be able to see it in the volume mixer but now it's appearing but still no sound. I've tried everything as well (DirectX, windows hotfix, changing playback settings, volume control options, in-game menus, uninstalled and reinstalled twice [once deleting the appdata documents and progam files folder for ArmA 3]). This also only happens for ArmA 3. Not any other game I own. I recently checked the rpt files located in the appdata/local/arma3 folder and it says this:

23:42:47 Sound engine not initialized properly - dummy sound implementation used, NO SOUND !!!
23:42:47 InitSound ...
23:42:47 InitSound - complete

What does this mean? It looks like I've found the problem but I've looked everywhere and I can't seem to find anything related to fix it. Help please. Thanks.