ARA works under Rossetta as expected. So when I get to a point that I need tuning/etc I switch to the emulation. But, honestly I'm not sure I notice any real difference otherwise...and I forget a lot...(sigh)...I've learned to use Melodyne on just about everything, vocal tuning is now the least of it actually. AAR, you can work out whatever works best you in your need...Cheers!.../s~