How to Change Every Instance of One Note in Sequencer Mode

[Korgdude123]

Ok. Does anyone know how to change one note in a recording, every time it plays (regardless of the octave)? For instance, I made this recording of a song using only the notes in the C major chord.

https://www.youtube.com/watch?v=SSn9dD5L47A

Now let's say I would want to change every instance of the note E (whether it's E4, E3, etc.) into a Eb to make the whole song in C minor. Anyone know of a way to do that?

[spaceman3]

I use Track Edit.
Go to Track Edit tab.
Go to drop down menu at top right of screen.
Choose Shift/Erase Note.
From there you can edit or change a note that repeats for measures or an the entire song, if desired.

Note range, Shift Note, Replace, should get you there.
Hope this helps.