The lion kingdom once got good at entering music in Finale by playing the chords while never understanding how the rest of the world mastered dragging & dropping notes with a mouse.  There were still problems, not to mention it was expensive.  The pirated version had a crummy workaround which involved a firewall.  Playback didn't work.

The general idea is to expand on that with a simpler program just focused on capturing notation from played chords.  It would just capture whole notes for the current point in time.  The pitch bender would advance up or down an 8va.  The right pedal would advance a note.  The left pedal would delete the note on the left.