There is a video instruction of this effect in Asher's "5 Card Stud". This, along with other effects, and a movie of sorts. The teaching doesn't go much into detail, but it gives just enough for you to learn it.
The effect, though a little angle sensitive, is fast and visual and they don't really see it coming. Produce the aces in quick succession and it'd look like you're pulling them out of thin air. Requires a simple move that you most likely know.
Though I can perform it, I haven't done it live for an audience yet. I had to sacrifice a little of the visual aspect though, by using the first two cards as a little bit of cover-up for the third production (waving the 2 cards in front of your other hand, then a 3rd card is produced. You'd know this if you have it.), and the fourth I guess is a little bit knacky. This is the way I'll do it until I get it perfectly. Thankfully, none but the mirror have seen this less visual version. The whole routine itself, in my opinion is actually a bit knacky, in the sense of producing them fluidly and smoothly.