Thanks for this -it helps me get a better grip on how iReal pro and the forum works. And I certainly appreciate the hard work people like you have done and then offered it for public use. However I take issue slightly issue, a bit, about DFB using 'vanilla' chords. Surely what you're calling vanilla is really a european approach to jazz that is less influenced by the 'blues'. Dominant 7th chords/notes are replaced with 6ths (major or minor)