Hi all, I'm new to TrumpetMaster forumn. I've noticed that whenever I play long music, in particular ones without long measures of rest, that my tone quality thins out over time eventually becoming very airy. In the past, I thought this was because I didn't have enough air, but recenty I believe it is because I don't have alot of endurance. Am I correct? What suggestions do you have if I am? Also, it's been recommended alot on many trumpet websites that I learn how to lip buzz without the mouthpiece in order to improve my tone quality, endurance, and range. I've been practicing my lip buzz for about week now. However when I try to lip buzz into my trumpet, it's very uncomfortable. Furthermore, I'm unable to get any higher or lower octaves. I'm probably not doing it right. I've read on one website that trumpet players who don't know how to lip buzz usually have to push their horn against thier lips to go higher octaves. I'm able to get up to a double C and sometimes a little higher, but I don't believe I'm pushing the trumpet onto my lips. What do you all suggest?