Sylvan I did discover that if I start a new project in Platinum, the glitch does not occur. If I open a project that was produced in X3, it does occur.

Thats what I'm seeing too

Sylvan
I will do that Noel. I did discover that if I start a new project in Platinum, the glitch does not occur. If I open a project that was produced in X3, it does occur. I will follow your steps shortly. I must do a few things first (family errands).

That's interesting. One thing we saw with your video is that your disk meter shows that you are close to full with your audio hard disk. I wonder if you are getting into a state where the disk cannot keep up or is fragmented and therefore slow. Some things to try. Hover your mouse over the disk icon in the disk meter area and see how much it is using when the glitch occurs. If you see spiking that could be a sign of overload. Have you tried copying your project to another drive that has more disk space?
 
Also Melodyne has a disk cache that is stored here in my docs: \Documents\Celemony\Separations
This cache can grow to be huge if you have never cleaned it. It could also be corrupted.
Try clearing out that cache by deleting the files in that folder and let Melodyne build it again. See if that resolves the issue. I have had some weird things happen when that gets big. You can also configure the cache size in Melodynes preferences or make it smaller.
 
Let me know if this resolves it.

Last thing to try. Increase your playback IO buffer size in Preferences and report back if it changes anything.

I can also reproduce this problem with an old X3 project using Melodyne Editor. I did not install Melodyne Essential from Command Center and had no problems with SONARPLT recognizing my previously installed Melodyne Editor. My C: drive disk space usage is also fairly high (82%) but not showing red in the Disk Meter. I have 12GB of RAM and my System Memory Usage meter was at 19%. I haven't tried it with a new project yet.
 
I find that I can reproduce the problem a little easier if I have two different clips set up as unrendered Melodyne Region FXs at the same time. I can open the Melodyne editor in the Multidock or just open Track View and start and restart audio playback by double-clicking in the Timeline quite a bit. Eventually the audio playback will start to stutter or skip. I tried many combinations of playback IO buffer and ASIO buffer sizes (including playback buffer maximum of 2048 and my ASIO max buffer size of 1024) to no effect. I also cleared the Melodyne cache folder to no effect.
 
I can also reproduce the problem with only one Region FX, but it seems to take a lot more effort to make it happen. 
 
I could never reproduce the issue again once I rendered the regions. The rendered audio played perfectly even when the clip would stutter while being auditioned. Tomorrow I'll try to reproduce the issue with a new project.
 
Regards,
Don
 

Hi Sylvan,
 
You are welcome, no thanks necessary its job to investigate this stuff and make it work smoothly for you guys. We spent a lot of time on melodyne/ARA support even in this cycle for some new stuff as well as improvements and bug fixes. The intermittent nature of this is probably why it was not seen and some of our testers were trying it on pretty large projects. Even Celemony who have been in the loop with us throughout did not notice this issue.
Don I will try following up on your suggestion of having multiple regions. There could be something to that scenario that makes it more likely to happen. I think its unlikely that its related to old projects vs new. I suspect newer projects write audio data in an area of the drive that is less congested and therefore disk latency is lower.
 
I'm sure we'll find it soon. I'm waiting on Celemony for some pointers on the symptoms and should have some more leads then. The glitching is not related to latency - if you notice it sounds like a little snippet of audio is repeated. To me that sounds like an ARA disk read within melodyne failed or took too long to complete and therefore resulted in the previous chunk being repeated or something. ARA is a complex concert of operations between the DAW and plugin so it can be tricky locating where the problem is sometimes. In this case the actual glitch is occurring within Melodynes engine but it could be caused by a delayed host read or something. Once I can get a repro it will be easier to investigate.
 

My melodynes "Transfer" option and everything else is Greyed out. It says its registered and license in melodyne but seems not actually wanna do its job. I think its mad at me for all the horrid vocals iv put through it maybe.

Fixed my issue too! Great work by Noel to solve this so quickly.