The dirty secret of brass instruments. I wonder if they could make a direct air-powered vibrator so that one doesn't have to torture their lips. It may also make life easier for amateurs. I imagine it may result in loss of control for subtle effects, but some amateurs will accept that.
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).
https://www.youtube.com/watch?v=NFDNY9_W0ws
A simpler example would be the type of vuvuzela which has a double reed embedded in the tube, so that just blowing into it causes a loud honk.
This fact is, imho, a motivating principle behind the genesis of various synthesizer designs and concepts. We synthesists wish we could do this stuff with our mouths, but the LFO's and the VCO's and the various and sundry other oscillating things represented in the electronic musical instrument world, can't blow a farts worth in comparison to a good trumpeter...