This post is the same as your
other. The problem isn't iTunes nor bounce to disk, if you're on a Mac, unless you have the known versions that causes problems. The audio from a DAW and iTunes (with options off) and no fader moves or fx after bouncing
without compression completely cancels each other out when flipped 180 degrees out of phase.
You've been given alternatives to try. As far as the Bounce to Disk itself, poundaproblem gives you your answer. Depending on how you're bouncing, what you're bouncing may not sound the same in
any other application as compared to Pro Tools. So, this may be user error since you aren't giving any details. Then you have aaonli and bennisixx also giving you detailed answers. No offense man, but it seems like you aren't even trying the suggestion all the people have given you in both threads.
As suggested by bennisixx, consider your pan laws/rules and make sure they're what you want them to be. Depending on which version of Pro Tools this may not be changeable.

As poundaproblem said, we need to know how you're bouncing to disk. What are your settings?

Especially of note, did you dither prior and are you bouncing at a sample rate other than your session?

In iTunes turn off these settings as well as the EQ.


Also, make sure the sample rate in AMS matches both the sample rate of your session and the file you bounced to disk. iTunes sometimes does NOT change this because it doesn't send a message to CoreAudio to reset your playblack device's clock. If the file and your playback device's sample rate differ, iTunes will resample up or down to match that in AMS...which will change the sound.

See your other thread for tons of other alternatives to iTunes. Come on, son. In the end, iTunes using CoreAudio sounds the same as any other CoreAudio app. Now if you just don't like iTunes, that's understandable.