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I'm trying to use processing to do a FFT on any audio playing through my computer. Depending on frequency, I'd like it to send a character to my arduino. In turn the arduino will light up certain portions of my led strip with different colors. I get the arduino part, and that functions as expected. What I can't seem to figure out is how to isolate the bands, and do not understand the documentation on getBand().
I have seen code out that that will light up different led lights (synced to music) but not how to "if low band is increasing rapidly, send character to the arduino" if you will.
Anybody have any experience with this or example code that I could pick apart?