Can anyone please advise me on this? Despite having a half-decent machine to run my music studio, I am getting stupidly high CPU usage using ProTools M-Powered 7.43. And get frequent low-CPU messages despite running a bare minimum of plugins.

For example, without ANYthing loaded (i.e. no session), CPU usage is around 20% of the computer total. When I have a session loaded with no tracks, and no plugins, it is a little more than that.

It doesn't seem to make much difference whether I change the buffer sizes, or even the number of processors .... still very busy CPUs. I wonder what they are DOING all the time?

Any help much appreciated