Hello. My names Peter, I play trumpet, and I'm probably better than you. Just kidding. I do have some questions for y'all fellow trumpet players, and my first question is about mouthpiece exercises. I just got a BERP. It's wonderful. However, about mouthpiece exercises: I've got a little predicament. A few years ago, I had the thing where my embochre was very much off its center. I started over. Now everything's good, save a little air-support problem, but I can deal with that. With that, I came up with a method for playing the high parts that are delt to me, now with decent endurance. However, while my range is good up and down, my problem is with transitioning between the high and low register of my embochre. I watch myself in the mirror and feel what's going on and I can see that I cannot go from my low to my high. I can go from my low to a strained high, not at all beautiful, and I can go (better, in comparison) from my high to very nearly my low. How can I fix this? What kind of exercises (specific) can I do to help it along? (If sirens, howso?) Feedback much appreciated.