Having performance issues using Cubase on Mac OS X 10.10.5 or MacOS Sierra and Cubase Pro 8.5 or Cubase Pro 9. Tested with all combinations, which result in the same issue with VEP 6. The CPU load goes through the roof with version 6.x, which did not happen with version 5.x.

I have a project that connects to three slave computers using VEP. Prior to updating to VEP 6 there were no issues. Using VEP 6 is unsuable at the moment due to the CPU load issue.

Still tracking down the source, but at this point it solidly points to VEP 6 as being the culprit.

Anyone experiencing similar issues? Anyone found a remedy?

Quick update:

The culprit seems to be a arbitrary resetting of the buffer settings for each VEP instance in Cubase. The template is rather large with 64 instances of VEP connecting to three workstations. I noticed that a significant number of instances were reset to using the "none" setting for the Latency Buffer in VEP. This resulted in the extremely high CPU load and makes perfect sense. After setting them back to using 2 buffers, the CPU load has moved back into the range it was before.

Additionally, save time in Cubase increased to a tremendous amount. I noticed that "Decouple from Instance" had also been reset.

So, all that to say that the issue has been resolved by checking that all instances are using the previous (2) buffers and that all instances are decoupled.

Note: I assume at this point that this was caused by upgrading to Cubase Pro 9, which must have reset some of the VEP instances, and upgrading to VEP 6, which may have confused tracking down the issue at first.

Hi Jurgen, 

Thanks for the update, I will investigate the behaviour of Cubase 9 concerning the plug-in settings tomorrow!

Best, 
Paul