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Advanced Graphic EQ – Delayed Peaks
Hello, I’m looking for a way to create some stylized eq peaks similar to the one’s you see in this video (around 1:19): https://www.youtube.com/watch?v=UkFQbRRt-hE
Have a system currently that has individual layers for each eq band and am trying to write an expression for individual peak layers that would reference their unique band layers and move accordingly.
The challenge is that I’d like each peak to be pushed up by thier band and then fall at a constant rate. My approach so far has been to look at the band layer and determine whether it’s moving up or down and then, if it’s close enough to the peak layer, follow it’s position (so far so good). The challenge I’m having is with that constant rate business. I’m coming from an actionscript background so the lack of global variables is throwing me for a loop.
Any help would be much appreciated!
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2 Replies
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It’s a little tricky and the specifics depend on how you have things set up, but in general, your expression needs to go back in time, frame-by-frame, get the audio level at that time, calculate the value it would have at the current frame using your decay formula. Do that for each frame and save the maximum result. You only have to go as far back as it would take the largest possible peak to decay completely.
Dan
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Thanks so much Dan!
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