THEORY TIP: There are indeed rules now for applied theory (improvised music) and there IS a right and wrong use of nomenclature and terminology. Though you should know both, professors Bill Dobbins, Ray Wright, and Rich Madison have made the distinction. For example, there is no such thing as a C 11 chord. Here's why; the suspension and resolution cannot co-exist over the same root. Correctly describing chord qualities (and jazz theory in general) requires a bit of study. Take time to learn it (the CORRECT way). For more information, contact me via this website!