To install the Note Gate MIDI FX Script, unzip the downloaded package and move the file named 441K Note Gate.pst to the following folder. You will have to create the Scripter folder if it doesn’t already exist.

~/Music/Audio Music Apps/Plug-In Settings/Scripter

After installation,Note Gate can be found in MainStage 3’s Scripter MIDI FX plugin dropdown menu.


Note Gate is a simple MIDI FX script with two customizable parameters.

  • Trigger Note refers to the MIDI note that will trigger the script.
  • Activation Threshold refers to the number of times the trigger note can be played before the script blocks the note on message.