There s little point staying on X3 and hoping things will change - there will be no more updates there! Definitely give Splat on a clean install of windows 10 a try though. I have no issues at all running Melodyne 4 Studio. That said, I do tend to bounce melodyne tracks once I am done editing. 
 
I have run DAW's and editing software on both Mac and PC. In my experience, Sonar on a well set up PC is easily as stable as anything on a Mac. That's not to say that other software doesn't have its strengths over Sonar and vice versa. It's just that once set up properly there really is little difference in stability.

MarioD
FWIW - A friend of mine got tired of the problems he was having with Windows, virus protection and such so he sold everything and bought a Mac.  He was bragging to everyone about the ease of using it and the fact that it was so safe to use on-line.  About 8 months later he was crying the blues.  He got a virus and loss all of his programs and data. He didn't think that he needed any backups with a Mac.
 
Moral of the story is the old "the grass looks greener on the other side" ain't necessarily true.
 

Acquiring a virus on a Mac or any other Unix-like system is pretty difficult to do if you follow even basic security principles such as not explicitly giving something permission to run its installer if you don't know what it is. Of course, if you disregard basic stuff like giving administrator accounts passwords you'll quite likely end up in a mess. And the same applies to Windows. If you're one of those people who thinks system alerts are a silly nuisance and just hits 'yes' every time a pop-up asks for your permission to do something whether you know what that something is or not then be prepared for trouble.

And not backing data up to a different drive to the one it normally resides on, and ideally not even an integral part of the same computer, is just plain stupid no matter what OS or hardware you have. Nothing is immune to hardware failure.

I guess some people learn from other people's descriptions of what went wrong for them or can go wrong and take steps to avoid it happening to them. And some people just have to learn the hard way.

Macs come with a very good backup system, Time Machine, that runs automatically unless the user switches it off. Though the way it works can be intrusive for audio/video work, in which case the free Time Machine Editor program which enables Tome Machine scheduling comes in handy.

tenfoot
I have run DAW's and editing software on both Mac and PC. In my experience, Sonar on a well set up PC is easily as stable as anything on a Mac. That's not to say that other software doesn't have its strengths over Sonar and vice versa. It's just that once set up properly there really is little difference in stability.

I'm primarily a Mac user, and I agree with you. Logic crashed on me yesterday. Doesn't happen often, and like Sonar when it does the culprit is often a third-party plugin, Amplitube being the culprit yesterday.

The advantage Macs have is that they come from the factory configured to pretty much "just work" with low-latency audio while most PCs don't. I happen to prefer MacOS to Windows, but that's a matter of personal preference and might be due to me for some reason finding Unix type systems easier to manage.

The advantages PCs have over Macs is price and the amount of sheer power you get for that price.

eph221
There's not a day goes by that something goofy doesn't happen with SPLAT.  Seriously.  

If the problem was the software, then others would have the same experience. Yet many people, myself included, find SONAR reliable and stable. So, you need to find out what about your computer environment is different from the ones where SONAR works fine.
 
This doesn't mean other programs won't work properly in the same environment. Then again you could have SONAR work properly, and others do something "goofy." 
 
Software exists within a system and is heavily dependent upon that system. That is the case with both Mac and Windows. However, Apple exercises much tighter control over their system which is one of the reasons you pay a premium. Windows provides much greater choice and more power at a lower cost, but the tradeoff is having to optimize the system for your particular task at hand.

You pay more for a Mac because they don't let third-party people make hardware for them. They are stringent with their hardware, and the customer pays for it, but it insures it is solid.
 
Now, what a lot of people LOVE to do in a Windows environment, is to cheap out on a motherboard and/or other components. The components aren't vigorously tested, and the drivers aren't well-written nor updated.
 
Then people wonder why they don't work well! Apply the same principle with an audio interface.
 
I'm not saying this OP is doing that. but I've seen it on this forum HUNDREDS of times through the year. When you deal with programs that need the lowest latency, you have to insure you have quality parts!
 
You get what you pay for. My box in my signature is home-built with quality components, and been solid for YEARS.

That is not including defects/flaws in software/configuration/parts ...which can drive one batty (I think all the forum people who have been for years have gone through it). I don't want to discount the OP, but I use Melodyne a bunch and have no issue ...but I use it in bite-size morsels, and never have had an issue.
 

tlw

MarioD
FWIW - A friend of mine got tired of the problems he was having with Windows, virus protection and such so he sold everything and bought a Mac.  He was bragging to everyone about the ease of using it and the fact that it was so safe to use on-line.  About 8 months later he was crying the blues.  He got a virus and loss all of his programs and data. He didn't think that he needed any backups with a Mac.
 
Moral of the story is the old "the grass looks greener on the other side" ain't necessarily true.
 

Acquiring a virus on a Mac or any other Unix-like system is pretty difficult to do if you follow even basic security principles such as not explicitly giving something permission to run its installer if you don't know what it is. Of course, if you disregard basic stuff like giving administrator accounts passwords you'll quite likely end up in a mess. And the same applies to Windows. If you're one of those people who thinks system alerts are a silly nuisance and just hits 'yes' every time a pop-up asks for your permission to do something whether you know what that something is or not then be prepared for trouble.

And not backing data up to a different drive to the one it normally resides on, and ideally not even an integral part of the same computer, is just plain stupid no matter what OS or hardware you have. Nothing is immune to hardware failure.

I guess some people learn from other people's descriptions of what went wrong for them or can go wrong and take steps to avoid it happening to them. And some people just have to learn the hard way.

Macs come with a very good backup system, Time Machine, that runs automatically unless the user switches it off. Though the way it works can be intrusive for audio/video work, in which case the free Time Machine Editor program which enables Tome Machine scheduling comes in handy.

I agree.  I wasn't trying to be down on Macs.  If you or anyone else got that impression I apologize.
 
My point was if you are on-line you not only have to be careful you also need backups.  He got a false sense of security purchasing a Mac.  Safer yes but infallible no.  He is one person whom should not have a computer.

Rob[atSound-Rehab]
Coming from a Roland interface I think that QuadCapture may be part of your poor situation ... I could never obtain full stability while I was still on the Roland audio drivers. While it got somewhat better with Platinum, it only got resolved properly when switching to a different interface brand.
 
Also, X3 is old. Melodyne 4 is new. I even had issues (minor ones, no crashes though) with Platinum and Melodyne 2.x which were much closer in sync ... problems disappeared once I upgraded to Melodyne 4 which seems to go fine with Platinum.

This has been my experience as well. QuadCapture now sits on my system and is used for 
Windows sounds, playing net music, mp3's, wave files etc via my stereo. I had never-ending issues whilst using it with X3 and then Sonar. Once I made the investment to a RME audio interface, things became much more stable, although not perfect but I don't think it'll ever be totally flawless.
 
I'm on the latest Spat and it's proving to be very reliable. I still get weird overloads on occasion when I place plug-ins on a bus but it's something I workaround and for the most part, I'm getting hours and hours of stability...which means making and mixing music. :-)

No problems with latest versions of SPLAT and Melodyne 4 Editor.  Like Craig and many others have said, just remember to render as you go when you're done editing a Melodyne region clip.  Of course, always keep a safe copy of your original audio track so you can go back if the singer prefers his out-of-tune vocal.

Well the OP wandered off, I guess they are out busy shopping for a Mac.
 
I put my money on the Roland... Certainly won't be very happy plugged into a Mac either.