MainStage Instantly silence the previous patch
Sometimes you may want the sound of the previous patch to continue after you select a new patch, as when you want to sustain a chord pad while soloing over it. At other times, you may want to silence the sound of the previous patch instantly when you select a new patch.
Instantly silence the previous patch when you select a patch
In the Attributes tab of the Patch Inspector, select the Instantly Silence Previous Patch checkbox.