Thanks for that!
I know the basics, but you're right I haven't explain the facts!!!
Something strange happen.
When I turn the mix button effect 1 on the Px, the LFO rate of the DM change. Even when I select "off" on the sending program and control midi menu on the Px.
That's why I'm talk about CC....
I should go deeper in this way.
And know... I'm a dumb!
Very strange thing by the way!!!