Logic Pro-X issue (?) when using more than 8 Processing Threads
This is my first post Apple Support Communities, so, a big Hello to everyone here.
Recently I bought a used Mac Pro 4.1(in a very good condition) with 2 quad core Intel Xeon 2.26.
My software: Yosemite 10.10.3, Logic Pro X 10.1.1, Pro Tools 11, Nuendo 4, Wavelab 8.5 and some audio plugins.
Everything was working as expected except Logic which even on the minimal settings with low buffer size (32 or 64) I faced a serious latency problem.
There was always a latency of about a sixteenth note. I did everything I could do to resolve this issue (deleting logic's preference playlist, reinstalling Logic bla bla bla and in the end a clean install of Yosemite). Nothing changed. The latency was still there. All the other software I'm using (Pro Tools etc) don't have any latency problem.
Finally by lucky, I decided to take a look at the audio preferences of LogicX and change the value on the Processing Threads from the default automatic(16 threads) to 8 and voila! The latency disappeared! I tried also on 16 - 14 -12- 10 threads but always the latency was coming back.
So I stayed in tune and keep working with the setting of 8 threads.
My question is: Is it normal to happen in Logic? Is Logic x limited to work properly only with 8 threads or something else is going on here?
Mac Pro, OS X Yosemite (10.10.3)