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I didn't go into much detail about it but there's a whole rabbit hole of color theory and color models. For example, the spectrum effect assigns different colors to different frequency bins, but also adjusts the assignment over time to avoid a static looking effect. It does this by rotating a "color angle" kind of like the HSL model.

I really like your LED installation in Rosetta Hall, it looks beautiful!

by doctorhandshake6 hours ago|

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Thanks! Great article - would like to read one about the color rabbit hole pls ;)

by PaulHoule7 hours ago|

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Yeah, "diabolical" overstates it. It isn't a wicked problem

https://en.wikipedia.org/wiki/Wicked_problem

Kinda funny but I am a fan of green LED light to supplement natural light on hot summer days. I can feel the radiant heat from LED lights on my bare skin and since the human eye is most sensitive to green light I feel the most comfortable with my LED strip set to (0,255,0)

by scottlawson6 hours ago|

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I'd actually argue it has some wicked problem characteristics. The input space is enormous (all possible audio), perception is subjective and nonlinear, and there's no objective function to optimize against, only "does this feel right?". Every solution you try reframes what "good" means. It's not as hard as social planning but is way harder than it sounds, no pun intended.

by jcelerier1 hours ago|

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isn't it the exact same problem than "making a good movie" or "making a good book" ? this is just thoroughly subjective.

When the author says:

> Every commercial audio reactive LED strip I've seen does this badly. They use simple volume detection or naive FFTs and call it a day. They don't model human perception on either side, which is why they all look the same.

well no, if they sell, then they are doing just fine until someone comes up with the $next $thing

by ogurechny8 minutes ago|

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Fidget spinners also sell.

by PaulHoule6 hours ago|

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Ever seen https://www.youtube.com/watch?v=oNyXYPhnUIs ? There are a lot of things people might think feels right.

(Note both the scanner in front of KITT and the visual FX on his dashboard when he speaks, which changes from season to season.)

by fragmede5 hours ago|

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fta: The biggest unsolved problem is making it work well on all kinds of music.

The wickedness comes from wanting something that works just as well for John Summit as the Grateful Dead as Mozart and Bad Bunny.

But it seems like you could cheat for installations where the type of music is known and go from there. The other cheat is to have a "tap" button, and to pull that data and go from there.

mental note: the thought "it can't be that hard" when obviously it is sent me down a rabbit hole for a couple of hours