Crank up your ambience volume and proportionally lower every other type of volume so you can hear ambience better. With this, you will be able to hear background noises and sounds of stage rumbles during Ultra.
I really like some of these, like a screaming man wrapped in spider web on Sadira stage, or storm on Thunder`s stage.
Some of these sounds are a bummer though, like when Kraken destroys ship, it sounds like breaking a match, literally.
But overall, a little improvement, you can hear things you never heard before.