John goodevening,

I’ve been watching Greg’s video about Overcoming a negative psychology when playing the trumpet and in that video Greg said that to get the apature work good the airstream needs to be straight. So there is the answer i think. I have to learn to move my jaw forward during playing to get the restult that i want. If someone has an other way of thinking i would love to hear that.

Greetings,

Reijer