For Omni users, I’ll share my test result.
First of all, you should use “flat” or “Hi FI” EQ mode.
You can’t use Scratch EQ mode. It cause my trouble.
Omni manufacturer said its because serato 7inch vinyl’s low frequecy makes some trouble with djay.
And you can’t use built-in speaker too. It vibrates Omni player, then position is not stable.
But I think scratching serato 7inch vinyl with djay is not perfect.
After setting EQ and using separated speaker, I found position is not stable.
If you want to scratch for long time after a few minutes you 'll find position was changed. (Compared to before, getting better but still stressful.)
You can put cue button to adjust position again during scratch. This is my solution to this problem for now.
