I just upgraded with the release of 1.9.9, and am noticing large CPU spikes when using audio unit synths. I have been playing with a brand new project, which has a single AU instrument (iSem or Viking), and when idle, the CPU shows nothing. But when I press a key on the keyboard, the CPU spikes up to 50%+ while notes are being played. When I record this and add a second AU instrument, the CPU is all over the place. I have even seen the CPU shoot up to the top momentarily when the first key is played.
Even going back and playing previous projects that I never notified this, shows the CPU all over the place.
Plus I am not sure if this is a bug or not, but I can’t save settings within the Viking Synth AU