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Silence MIDI notes in MainStage
MainStage also includes a Panic function. The Panic function immediately silences any hanging MIDI notes.
Silence all MIDI notes
In MainStage, do one of the following:
Press Control-P.
Double-click the MIDI Monitor in the toolbar.
If you have mapped the Panic function to a screen control, press or move the corresponding controller.
If you are using a Mac with a Touch Bar, you can press the Panic button on the Touch Bar to silence any hanging MIDI notes.