@55Yr-Comback said in Proper Embouchure?:
@administrator Thanks! But two questions though.
1st one....After the MMM, do you firm your corners, bring them slightly in toward center firm against you teeth, & then have your lips firm against your teeth & are your lips just slightly touching? And when I say this, I don't mean rigid or in a stiff manner. In other words, if you measured "firm" for doing that on a 1 to 10 scale, it would be at a 3 the most.
2nd question is... after you've placed the mpc, do you put your tongue through your lips to open your lips slightly, or do you let your air stream open them.
Understand I'm not trying to be technical or mechanical. I just want to know if by doing this, it results in an embouchure that's not loose & sloppy. THANKS!!
Caveat: I'm not an instructor or even a very good player, so take this for what it's worth. I was going to opine that you're overthinking it, but then I started overthinking
it, too. 
I'll offer up a video by Charlie Porter. After setting the mouthpiece on his closed lips, he consciously pulls them apart just a bit. I didn't think I did that, but it turns out that
I do (unconsciously).
IMHO, if the lips are truly touching without airflow, then adding airflow could allow the creation of a buzz on just the mouthpiece (or visualizer, in the video). If that buzz already exists with the mouthpiece in the horn before the horn itself starts to respond, you get the dirty articulation that Charlie describes. If you've formed a good embouchure on the mouthpiece alone, it should not buzz when you add airflow. But keep blowing while sliding the mouthpiece into the horn and you should get a
nice tone.
Charlie pokes his tongue out to wet his lips, but I don't think that will keep the lips open if the aperture is closed to start with.