I am using my Virus TI in combination with a Presonus Quantum2626 to feed the analog outs back into an aux channel in Logic Pro X.
Using this interface I managed to get I/O buffer size down to 64. When playing back the midi notes I only have to manually pre delay the notes 6 ms to get them perfectly on beat.
This works great, until I select or open another (Audio or Instrument) channel.
When the instrument channel of the Virus TI is not selected, the midi timing of my Virus goes all screwed up. It only goes back to normal when I press stop and select the instrument channel of the Virus TI again. This also happens when using the HCvirus plugin btw. Changing the buffer size make no difference, only the midi jittering gets worse with larger buffer sizes.
does anyone know how to solve this?
Here's a video I recorded to show the problem. Youtube Video
OS: MacOS 10.14.6 Mojave
DAW: Logic Pro X 10.5.2
Hardware: Presonus Quantum2626