Houdini CHOP Talk 3 Audio Processing 1 - Audio Spectrum

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What I Found

What I Found

Күн бұрын

Here I show how to use CHOPs in Houdini to deform geometry with audio.
I quickly walk though the set up to use what we make as velocity fields in a FLIP sim. The flip sim isn't the main point of this video, but it was interesting enough to include and if you're interested in diving deeper into it, the file is available on Gumroad.
whatifound.gumroad.com/l/audi...
The audio used from Six Umbrellas, it's a song named Downfall. It is used under Creative Commons, and can be downloaded here
freemusicarchive.org/music/Si...
0:00 Intro
2:35 Start the build from scratch with line
4:15 Import audio
5:25 Envelope filter
7:51 Using the Channel SOP
11:00 Using a Wrangle for the deformation
13:49 Slip CHOP hack
15:00 Spectrum CHOP
17:33 Trim CHOP
19:54 Stretch CHOP
24:08 Making the set up more procedural
28:24 Applying the system to a sphere
29:38 Wrangle deformation setup
31:51 Wrapping up general CHOP thoughts
33:20 A walk through of the FLIP setup
36:58 Wrap up / summary of what we did

Пікірлер: 15
@felipeamayaq
@felipeamayaq 2 жыл бұрын
This opens up so many possibilities. Thanks for doing this thorough playlist.
@Salvador-xy5es
@Salvador-xy5es 4 ай бұрын
very informative and lovely tutorial, Thank you
@maskpointer7555
@maskpointer7555 2 жыл бұрын
Great Video,Love it
@darkarps
@darkarps 2 жыл бұрын
really great tutorials, thank you :)
@aki_gong6271
@aki_gong6271 Жыл бұрын
Amazing content indeed ;)
@TheBFHmontage
@TheBFHmontage 2 жыл бұрын
Wow great video. I ended up using this to control the speed and rate of growth on a procedural fungus animation. Thanks!
@WhatIFound
@WhatIFound 2 жыл бұрын
That’s awesome. If it’s posted somewhere I’d love to see it.
@TheBFHmontage
@TheBFHmontage 2 жыл бұрын
@@WhatIFound I will come back and post a link once it’s finished!
@thehess
@thehess 2 жыл бұрын
Thank You
@dj_multiple_one
@dj_multiple_one 2 жыл бұрын
More tutorials about CH operators!
@matteomigliorini
@matteomigliorini Жыл бұрын
ok, nice! cool tutorial... BUT! BUT!.... If I want moved, inside the chops, the audio spectrum/track from frame 1 to 1001 how can I do? The shift and Time shift doesn't works like the TimeShift Sops... ?????
@metaturnal
@metaturnal 2 жыл бұрын
Hi, I wanted to use your setup to instead of moving points along an axis, use the audio spectrum to drive the time offset of a bullet sim's points. Do you have any idea on how to maybe control the shape of a chramp with the spectrum (in the other setup, the time offest is controlled by a chramp)? Or any other method to control the time offset? I made a post in the reddit forum, file included. Failing to combine the two setups.I you have the time and energy to take a look at it .. Post title: How to use spectrum chop amplitude to drive time offset of RBD sim pieces?
@WhatIFound
@WhatIFound 2 жыл бұрын
Hi, it's interesting, I started a lot of my CHOPs exploration wanting to drive time offsets, but my explorations have taken me different directions, seems like I should loop back. It's a bit more complicated of an explanation, but I'll try the short version here, and will at some point do a proper video about it. I also searched for your reddit post, but couldn't find it. If you @ me on twitter with the link I'm happy to take a look. To drive a timeshift sop you'll want one channel or curve that represents your timing. I do this a lot in Touchdesigner with audio. It takes two channels, the first is a linear representation of time, you could make a channel chop and set the value to $T or $T*.5, anything you want. Then the second channel would not be an audio spectrum, but rather take your audio file, feed that into an envelope, then feed that into a count chop. In the count chop dial in the trigger amount so that at each audio hit you get basically a stair stepped curve. Now you can use a filter chop to smooth out the steps, but still have an increasing curve. Then finally you use a math chop to either multiply or add those channels together. Finally feed the resulting channel directly into your timeshift sop. Hope that makes sense. Again, as I have a chance I'll do a proper demo of how to set this up, but if you're familiar with chops you should be able to get there. I've already covered the count chop in another video if you haven't already seen that. Thanks for the comment!
@metaturnal
@metaturnal 2 жыл бұрын
@@WhatIFound I thought I had added my reply here, I guess I didn't click enter.. Nice to hear you tarted out having similar goals in mind, maybe it might re-ignite your original interest. I will try to implement what you wrote in your answer here, though I am not sure if I am able to do so. Thank you though. I replied to your post on Twitter adding the link too.. Tbh this has been my first dip into chop ever, specifically because I wanted to achieve this - time offsetting based on the spectrum's amplitude - but I will check out your other videos too, your most recent upload looks interesting as well. Thanks for making these tutorials.
@antoniopepe
@antoniopepe 4 ай бұрын
@@WhatIFound Great. with your hint i managed to replicate the time remap setup . Really cool. thanks. there isnt so much information online on chop net :) 🙌🙌🙌
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