Thanks for the info - much appreciated.
A couple of notes from current project: This was a project that I started before I bought my Apollo Twin Thunderbolt (although I did have the Satellite UA-2). Maybe, changing from my MOTU 8pre over to UA’s drivers is causing these random crashes in cubase? The project also had a number of non-UA plugins as inserts which may have required too much CPU. I tried to mitigate by using FX tracks so I could use sends to reduce the CPU load. Anyhow – after this I still had the odd random crash. Also – this project would not run well under 768 buffer setting which is brutal.
After reading your message, I did some testing this morning.
I changed my buffer to 128. Anything lower than that will cause dropouts (setting it at 32 simply grinds everything to a screeching halt - 64 is not that close behind).
I opened up an empty project and recorded a guitar track and vocal track (then duplicated to create around 6 audio tracks). Then added 3 VSTi’s (Waves 88 Keyboard, Groove Agent SE and Kontakt Vintage Organs).
I then loaded up on UA plugins and a few non UA plugins (Izotope dynamics and a couple of CPU intensive Waves Reverbs).
I also installed the Turbo Boost disable app (more on that later).
I’m showing 85-90% CPU and 95 degrees with my test project. Dropout still occurs when opening a plugin or instrument during play back (probably normal behaviour).
Turbo Boost - installed the app (had to tell security preferences that I agree to the install). But it won’t allow me to turn off boost? When I try, my mac asks me for my login password. Not sure how to fix this right now (I read that you should not install the turbo boost app from the downloads folder which I did – so I uninstalled and re-installed from my desktop). No joy.
So, the problem may have been due to the change from MOTU to Apollo interface - really not sure. I’ll need to do a full project using Apollo to see if the problems persist.
Off topic question – do you use virtual channels much with your Apollo? I’ve tried them to route an audio track to a virtual channel (with a few UA plugins inserted), then routed back to Cubase. Problem is you can’t mix-down with the effects applied. I haven’t explored too much in terms of virtual channels, but it seems like adding UA plugins as inserts within Cubase is better (obviously with some latency in Cubase).