When I use my ozone 4 plugin, it slows down my vocals. The beat stays the same tempo but my vocals slows down whenever I select any presets. When I bypass it or remove the insert, it plays normal again
Does it slow down, or does it just go out of time?
Ozone is not intended as a mixing plugin and as such it brings about delays of around 1024 samples, sometimes more. If you really want to use Ozone whilst mixing I would recommend that you do the following:
Duplicate the vocal track, and make the original inactive (just to keep as backup)
Consolidate your new vocal track
Look at the delay that Ozone is causing (CTL [maybe ALT, I forget] click on the little strip beneath the fader until it says dly; usually it says "Vol" I think)
Nudge back your consolidated vocal track by the amount of samples indicated by "dly"
Your track should now be in time.
Once you're happy with the sound of whatever you're doing, I would now do the following:
Save settings in Ozone as a preset
Make your new vocal track inactive, and make the old one active again
Select the regions in your original vocal track you want to "Ozone"
Select Ozone from the Audio Suite menu at the top of the window.
Select the preset in Ozone, then hit process
I hope that helps, and that I have understood your problem correctly!
Even with Ozone's latency compensation on my mac pro there was still quite a bit of latency introduced by the plugin more than a few ms worth actually, so it was a bit.