Let's see, 5 cents a pop... hey, I can retire off of that!
Embouchure's are like zits.
Huh?!
Yeah, zits.
If I eat a lot of oil-rich food, have chocolate for dessert, and keep that up for say, three days? I will have a pimple garden on my face. Now, I can continue to eat like that and keep the Stridex and Clearasil people in business or I can stop eating junk to excess.
One can treat the symptom with mouthpieces, this horn, that horn... or one can sit up properly, take a full breath, and exhale efficiently.
Some folks get zits no matter how well they eat. They go to the doctor and get straightened out. Folks like that are in the minority.
Some folks get a poor sound no mattter how well they sit up, breathe , and exhale efficiently. Folks like that are in the minority. Then, an embouchure adjustment is likely in order.
ML