Assuming you play a brass instrument, I suggest to try this experiment: Blow air through your lips and purse then together, but do NOT buzz. Basically the "buzzing" without the buzz. When you do that, continue to and press your lips against the mouthpiece. You will make a note!
This was something my instructor showed me because use way too much of my lips when I play (a very common mistake with amateurs), and a lot of the power you use should be through your diaphragm (large versus small muscles).
This was something my instructor showed me because use way too much of my lips when I play (a very common mistake with amateurs), and a lot of the power you use should be through your diaphragm (large versus small muscles).