Trumpet - Air Direction And Improved Tone - Adam Robertson 

It SHOULD be foreign to you, its nonsense. It's just something trumpet players hear and then repeat. They have no idea what the air speed is. The tongue movements are related to embouchure effort. And the lips control the pitch. THATS WHY THE LIPS ARE CHANGING DUDE! THEY ARE CONTROLING THE PITCH!!

@@darryljones9208 yes the lips does control the pitch, but to what extent does the tongue affect the pitch?

@@da11king, the tongue has no direct effect on pitch.