Not everybody can transpose quickly just yet. It’s all about being musical right? 🙂 Jazz Theory Shortcuts This type of practice will help you take new pieces of jazz vocabulary you learn and quickly make it musical. It’s for that reason that many players (including myself) will practice a lot of musical concepts they learn (new voicings, patterns etc.) in context of a ii V I chord progression. Since you’ll hear the ii V I chord progression in so many great jazz tunes it’s vitally important that you learn how to play it quickly. As you continue to develop your jazz theory skills you’re going to want to make it a goal of being able to instantly play a ii-V-I chord progression in all 12 keys.