What chords do I absolutely have to know?

Secrets of Exciting Chords & Chord Progressions! Week One What piano chords do I absolutely, positively have to know? Click below to hear Duane walk you through this lesson: As you probably know, there are thousands and thousands of different chords - everything from basic major chords to minor 7ths to 13ths to suspensions to poly-chords. Someday, you might want to learn all those chords if you don't already know them. &nbsp..