Ok I'll give you the infos that I already gave to the technical support:
OSX VERSION: YOSEMITE (Updated to the last version)
LOGIC: Version X both on 10.0.7 and 10.1 (It give me always the problem)
SPARK: 2.1.426 (The last version)
MACHINE: Macbook pro retina, 16 gb of ram, i7 2,2ghz, 256 gb of hhd
NO HUB
I've tried different cables.
It works fine in standalone mode. It works quite fine in Live. It lags too much in Logic X. It's unusable. I already tried with another review of the version 2.1 but the problem is always the same. And the problem still remain also with the new version of Logic. Already complete uninstall and re-install.
It seems to be a graphical problem because when my plugin is open it starts to stuck and all the relative functions linked to the daw become to be unusable (like meters, faders etc). When i close the GUI the problem disappear. I downgrade the version to the 1.7.2 and the issue disappeared. The strange thing is that when the GUI is open but i put on the side trying to hide it the issue seems to disappear. But when the GUI is in the center of my screen it becomes unusable. You need some other infos? I d already made all the stuff to improve the perfomance like the midi settings, audio settings, IAC driver, increase and decrease the buffer size but the problem still remain.
I REALLY TRIED ALL THE THINGS.
THIS IS MY WORKFLOW:
I plug my spark le into usb (no hub) then
I normally open my DAW (logic in this case). Then i open spark 2 as plugin. Press play and then it starts to play. And now the issues. My spark 2 starts to lag, there's a delay between the controller and the software, the mixer starts to lag and all is delayed, the DAW meters starts to lag and glitch, the time bar starts to lag as well. But if i close the GUI my daw starts to work normally again. No delay no glitch. But if I open the GUI it starts again with lags and glitches. I noticed that if I try to move the GUI over the visible screen my DAW seems to work better and better till the GUI Completely disappered from the screen. But if move back the GUI into the visible screen the issue starts.
Then i decided to downgrade the spark version to the 1.7.2 and all works normally. I already made all the stuff linked to the midi problem in the enviroment connecting spark le to a new instruments and etc. I ve tried to change the screen resolution but nothing. I ve tried all but the problem still remain the same. Nothing can improve that issue.