I posted earlier on this topic, and have since tried out the following:
For this project, I was only using the satellite PC (running VE Pro 6) for one instrument, an acoustic guitar from Cinematic Guitars (within Kontakt). I've used that PC for two years with zero problems. The guitar part crackled randomly every time I played back the sequence from Cubase.
If I record-enable the instrument track and play it live, it doesn't crackle, with the sequence running or stopped.
I then switched the sample rate of the whole project from 48k to 44.1, and the cracking disappeared. If I switch back to 48k, the crackling shows up again, again only when I play back the recorded MIDI data from Cubase. If I play it live, it's fine.
Then, I installed Cimematic Guitars on the main DAW PC, loaded the same guitar instrument within Kontakt (no VE Pro), and the crackling showed up again.
The way I got through the project was to render the guitar part as audio at 44.1k, then sample rate convert it to 48k, so that I could bring it into the original project.
I still don't have a solution for this, and don't know where to point the problem; VE Pro 6, Kontakt, or the specific library. Because the also crackling occured within the DAW PC, it leads me to think it's not VE Pro 6, but I still think it was worth posting here.
Anyone have any ideas about this? Much appreciated.