Could you run an FFT on the image you want to display as a starting point for fi... | Hacker News

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		nitrogen on Jan 2, 2014 \| parent \| context \| favorite \| on: Machine that Levitates Objects Using Sound [video] Could you run an FFT on the image you want to display as a starting point for figuring out what frequencies you need?

HCIdivision17 on Jan 3, 2014 [–]

I always assume that you can figure out the needed FFT for a result, but having never actually tried, I have no idea if it's a fallacious assumption left over from working with lasers for a bit.

Some EE out there should have a strong opinion on the topic, might call up a friend about it.

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