Right now, I'm trying to master a lick that works over a II7 - V7 - I in a particular song. I would like to find all songs in library that have a dom7 - dom7 - tonic turnaround like that. This kind of thing comes up a lot for me. Maybe the UI is: user selects some (in this instance, maybe 3) measures, and a menu item of some kind allows: "Find songs like selection"