Staaaarange issue with Melodyne

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
 
 
 

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.
 
 

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..

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.

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).

The OP has a deliberately doubled track, it's not a ghost track under Melodine.  Pitch correcting one while leaving the other will create flanger/phaser/chorus type effects, depending on the amount of pitch shift applied.

You're right I mis-understood