Question

Specs:
Studio One 5.2.1.64495 Trial
EZDrummer 2 (build 21073 64-bit AU) Trial
Mac Mini M1, Big Sur 11.4 (20F71)
 

I found, that EZD2's UI dramatically slows down Studio One. Check out the video:

No heavy apps were launched during the test. Lags appear periodically: 85% slow, 15% normal.

Not only EZDrummer's UI freezing, but S1's too. This issue make EZD2 totally unusable in S1.

This problem is not reproduced in other DAWS (Logic and Ableton tested), so I suppose, that problem is in Studio One.

P.S.
Not sure, if it's useful, but Superior Drummer Trial doesn't have this issue.

Answer 1

Do you have hardware accelerated graphics in the options?  Try turning that off and trying again.  I looked at your video but I wasn't sure how how Ezdrummer was being triggered as I saw no midi events in either the arranger window nor the Ezdrummer midi lane.  

Answer 2

(didn't found how to reply)

aka_busker, I turned accelerated graphics off and tried again. The same problem.  I triggered events via midi-keyboard/