Game Crashes and flashing screens

[DzrtFox]

OK I'm almost positive it's the sound now.

With SoundFX off I finished my last scenario and played the first several turns of another scenario with no problem. I turned SoundFX back on and the game froze up within two turns. I rebooted, turned SoundFX back off, loaded my Autosave and finished the rest of the scenario without problem.