I'm an amature self-taught adult trumpeter and starting a year ago I could hardly blow the second line G. Over a year of regular practice, mostly with the MP only I now can hit and hold the staff-top G on the trumpet and the middle C is quite usable now. I notice that I can set my embouchure for a certain sub-range, of maybe an octave, maybe fifth and be able to control the sound within that range but it's hard to cover the whole range with one emouchure setting. What skills do I need to acquire and what types of exercises should I practice to feel myself comfortable from the low C up to G an octave and a fifth higher? This is what I think could be called "range connection" skills. I'll appreciate practical examples of the exercises and drills.