Greetings I am new to this community. I am a high school freshman trumpet player, and I have been playing since the fifth grade. I have a Yamaha YTR silver trumpet, and a Bach 7c mouthpiece. I need help on how to maintain a consistent and clear sounds while playing high notes, I was doing some Arban exercises in the 20's, and my high notes just don't sound nice. I do clarke, arban, long tones, and slurs. The highest note I have reached on the trumpet is a double G, but I can never seem to play high notes consistently with a good sound. Any help is appreciated. Thanks for reading.