Somehow, I believe the Fire Shrill Ember skill is not affected by FX volume adjustments. I have the game running with internal volume at 25% for all my sounds. The first time I fought the Fire Shrill, the Ember was really crazy loud. When I tried changed Elemental to 20% on my Windows Sound control panel and increasing everything in Elemental back to 100%, all the sounds become more equal, especially Ember.