How to Play a Diatonic Seventh Cors, Right Up and Down

On any diatonic seventh cord, i can simply play the diatonic scale that's associated with it. This is where it gets really good. So you can improvise using the harmonic minor scale from d over this, a sevenand this is often what you hear with the language. If we're going to the three cour mmember, that phrygian, right? Eave a b seven going there, right? It's five. Its secondary dominant is b seven. That b seven could be, again, based off of that e harmonic minor.