I'm pretty much writing these for beginners and amateurs, so I don't wanna confuse anybody
And doing an excellent job may I add - I hope you other guys are paying attention this stuff is musicians gold, wish someone had shown me all this stuff when I was a noob
The Devils interval
In jazz you get this thing called tritone substitution- It is a wicked device that allows you to change key without the listener being able to detect it, kind of like black magic ?