[Solved-ish: use Radius Mix Offline] Vocalsync doesn't seem to like "growl" vocals.

Edit: It seems that changing the Offline Render algorithm in the Clip Inspector from the default "Radius Solo (Vocal)" to "Radius Mix (Advanced)" works much better upon rendering. The regular Radius Mix probably works fine too.
 
To access those settings you just need to Press I on the keyboard to open the Inspector > Click on the "Clips" tab > Select the "Audiosnap" entry from the Clip Inspector options > Click on the "Offline" render option. Here you will see (for Vocalsync Region FX clips) the default is Radius Solo (Vocal). Switch it to Radius Mix (Advanced) before you render your Vocalsync clip.
 
This seems to get rid of all the "warbling" and various stretching type artifacts the Radius Solo option left behind.
 
Original Post...
 
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Yet another new goodie that seems to be metal-phobic. Been wanting try out VS for while now and got a chance today. I tried aligning a growl track to a more annunciated and it aligned well enough but had wicked artifacts. I figured rendering would get rid of them (Radius Vocal)... nope. The result was all warbly and what not. The tracks were hardly out of sync. I was just trying to nudge the syllables a tad closer.
 
Oh well. I might try other render algos but I don't think it's gonna work. I may have better luck with Melodyne but that has to be done by ear (or maybe the new version allows track syncing?).
 
Drum Replacer also seems to hate hi velocity metal too (tried that a few months ago)... at least on full kits which is understandable I guess but still disappointing. I'll be using that on some properly separated recordings soon enough so hopefully it will fare better... otherwise I'll have to apply the replacement manually which will be quite laborious.
 
I guess I'll have to save these tools for some of my more demure material.
 
D'oh!
 
Not a full on whinge. Just a report. These types of "automagic" tools never quite seem to work on my stuff. I think it's just too weird or something.

If you want some insight into why software designed to handle vocal music fails on death growl material, the following reference will give you some good insights. Basically, the growl is a pretty unmusical waveform, like a sustained drum or cymbal crash that largely obscures the overtone landmarks and complicates harmonic analysis.
 
https://courses.physics.illinois.edu/phys406/student_projects/spring05/chuck_stelzner/chuck_stelzner_p498pom_final_report.pdf
 
 

I use drum replacer to good effect. Frankly, the results aren't so different from extracting midi with audio snap, but it does seem better. I always copy the midi to a new channel and remove drum replacer from the original drum track. I usually use it on the kick. After copying the midi, I listen back with the replaced track soft and watch the now time on the midi track. I delete some notes, reduce the volume on others.

This turns out to be way less effort than doing it with audio snap extractions.

I've tried touching up snare, but that tells on the touch up more, so I usually bag it.

I haven't done anything interesting with vocal sync.

Yup... Radius Mix set as the Offline Render option in the Clip Inspector produced a much better after render clip. The default is Radius Solo which doesn't like growling it seems.
 
The results in general still aren't amazing overall but this is working better for sure.
 
I edited my OP to include full details/instructions.
 
Cheers.