Currently, you permit inserting of notes either in "no
accidental", sharp, flat, ... modes. I am wondering if
you could have a mode which is chromatic, so that all
notes could be reached simply by dragging the new note
to the desired place. In other words, when in insert
mode, if I drag a new note up the scale, it will not
hit only non-accidental (or sharp, etc.) notes, but it
will hit every note.