Hi,
Do you have that vibrato issue, when you use the original "Dirty Piano" Factory preset when using CMI V in standalone mode?
When i choose that preset, then it has no Vibrato, unless it's added by ie increasing the Vibrato Depth Slider on the GUI on top of the GUI keyboard.
Increasing the Movement Macro also add movement.
But it has to be added. So i don't understand why you talk about removing the Vibrato. How excactly have you saved the preset you use? As a CMI V preset in CMI V or as a DAW preset of some kind?
And is it when you select the Original factory preset you have Vibrato in Mainstage? Unless messages is sent to CMI V, when you load the original preset, then you should not have vibrato.
Do you have the issue, if you open a new DAW project and load CMI V, and then select the original factory preset "Dirty Piano".
Are you sure Mainstage does'nt send out a midi CC that ie is set to control Vibrato Depth or the Movement Macro? CMI's default midi config have set midi CC#72 to control the Vibrato depth. I don't know about how mainstage work, but be sure no messages is sent to CMI V.
I can't see this how this should be a CMI V issue. I don't have that issue. It look like it's about messages from Mainstage, if it happens when your controller is'nt connected to your computer, when you open your DAW.