Instructions

Open Signal MIDI editor and this page in different tabs.

1. In Signal MIDI editor, go to the Piano Roll and go to track you want.
   Put the red line playback position at the beginning of the first note.
   Press the following keystrokes to copy all the notes to the clipboard:
   
   
   Ctrl+A (Select All)
   Ctrl+C (Copy)
2. Come back to this tab and click the button that says "Remove duplicate notes from clipboard".
3. If it says it removed some notes, then go back to the Piano Roll and press the following keystrokes:
   
   
   Backspace (Delete)
   Ctrl+V (Paste)

The button will reset each time you come back to this tab.