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Originally Posted by jvizzlez

I've been getting much better at Stepmania lately, to the point that I can Ace RATO

Is that so?

Originally Posted by jvizzlez

With this said, I find myself constantly failing to songs like Minami Ikebukuro and sometimes even Oh Delia (the chart with all of the trills).

Those are vibrating files. You sort of tense your forearm until your hand starts shaking, and with practice you can control it to hit 12+ tps jacks for relatively long periods of time. (Hitting trills is the same idea, just on two keys at once.) It's a useful technique to know but I think most people would say that it's not impressive to score well on files based entirely around it.