I've got a vocal track and a double. They sound fine together sans Melodyne.
Executed Melodyne pitch correction on one track via Region FX. Sounds wonderful by itself on one track. However, when I unmute the second track, it sounds like there's a flanger on the vox.
I tried shifting one track over 1/128th note and the flange sound is gone. It only happens when the tracks are identical time-wise.
I tried the same thing with V-Vocal and got the same flanging result.
This is driving me nuts!
Anybody have this bizzare thing happen?
Thanks guys.
~jeff
 
 
 

pitch correction software ALWAYS changes the timing of the samples.  No way around it.  I'd re-think what you're trying to do.

Did you clone your Melodyne vocal to get a doubled track, or did you re-sing it and then apply Melodyne ?
 
I get this unwanted "flange" sound when I clone the vocal track, even if I apply random timing and pitch variations (a feature within melodyne editor), it doesn't really go away. However, if I change the notes of the cloned track to make a harmony vocal track, the flanging mostly disappears. So yeah, it happens when the tracks are identical time-wise, but it's also to do with identical pitch.
 
I haven't tried your idea of shifting the track by a slight amount, so think I'll play with that a bit, thanks for the tip.
 
 

Not sure what you mean by flanging, but did you bounce the tracks after using correction? Bouncing is necessary after any kind of editing. Also, if your clip is full length or fairly long , try chopping it up into several small clips before editing. This seems to have better results than trying to edit a full length clip. If you do this you should bounce each segment individually before editing them. Once they're all edited you can bounce them all together into one clip again.
 
Steve

If you created your Doubled track by cloning the original,  then applied pitch correction to only one of the tracks... they will sound like a flanger has been applied,  because that's basically how you create a flanging effect..

Yup, this is exactly what you'd expect from 2 signals with very similar pitches. Try a smaller degree of correction and see if that helps.

For the OP, very slight delays of the same signal create an effect called "comb filtering." This only becomes incredibly obvious when the shifts are small (also the basis for flangers and phasers, which are in motion).
 
As alluded to above, the comb filtering affect requires an identical/cloned signal to be created and perpetuated, and you can create the same effect (inadvertently) by mic'ing a sound improperly (such as the source, but the mic is also picking up the first reflection off a nearby surface to create a comb filter in that single recording).
 
If you are trying to create harmonies, consider separating the material further in time/pitch.

I have had this issue, happens every once in a while.  What you are hearing is both the original clip and the corrected clip together.  This used to happed sometimes with VVocal for me too. Things are supposed to have changed to where the original clip is not stored, but try this:
 
Open up take lanes. Click the plus sign to add a new empty lane. Then shift drag the Melodyne clip to the new empty lane. Now you should see both clips and be able to mute or delete the original.
 
No idea why this happens. and for me it's rare enough I've never bothered to report it.

Actually you can often still hear the flanging even if you have 2 totally different takes, 1 corrected and 1 not. Since one is almost exactly a fixed pitch and the other is a varying pitch very close to the first, you'll hear the comb filtering effects change as the tiny differences in pitch (and hence in phase) change also. With 2 uncorrected takes, the variations in pitch are usually large enough that you don't hear this (but not always).

I'm sure that's true, but if you are having the issue I've seen, with the original uncorrected clip still playing underneath, and you find it's physically there by moving the Melodyne clip out out of the way, then the source of the issue is clear.  
 
To be honest I don't recall if I had to bounce the Melodyne clip first or not, for OP it's something to try :)