I decided to share a few tricks about growl processing, layering and such. I'm not a native english speak so expect a few language failures here and there.
Growl sound i'm gonna be explaining starts at 1:10
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Growl itself is made using Dan Larsson's tutorial from youtube with a few tweaks here and there, but it sounds kinda raw if you leave it without further processing. To add a little more bass besides the usual sine sub with dist and whatnot I added low bass sound at F2 with added fifth to spice things a bit.
Growls themselves are similar to distorted guitars playing riffs and such, so i decided to try a few tricks from rock/metal world. Most of those didn't work at all but the one thing that added quite a bit of spice was impulse response.
Impulse responses are created to emulate famous guitar cabinets to use at home studios. If you apply them to growls and if the timbre is right sound beefs up quite a bit, impulses add quite a bit of mud so eq is very important here.
To use impulses you need something like space designer if you use logic.
Windows users can download free LePou ones here
http://lepouplugins.blogspot.ru/ it's called LeCab2.
You can also download awesome free distortion for both mac and pc there.
Here is the impulse pack i collected myself.
https://dl.dropbox.com/u/71126574/Impulse.zip
Second sound is not exactly growl but i thought that you guys are gonna be interested.
It starts at 1:10 too and continues through the drop
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Patch itself is kinda shit. Just wobbling modern talking or something like that. I didn't know anything about synthesis a year ago so i made this!
http://i.imgur.com/997S1O9.png
Essential thing here is good guitar distortion, which you can find anywhere these days. I used pod farm 2, but line 6 vst/au is buggy shit now, so you can use poulins or guitar rig or whatever. But the amp itself turns the sound into a complete mess of distorted highs and thats it. To sound good(or at least decent) you need a cab, so I used impulses again.
I also didn't know much about stereo width back then so I've done it guitar way again. This method requires two instances of the same sound panned left and right and then eq'd a little bit differently to create width. Now i just use izotope image
There are also layers of sub and bass.
Hope someone is gonna read this lol
