Just in case anyone wants to know how to use the LOW PRESSURE technique here goes .... Play low G (below stave).... Listen to the pitch of this note ... Ok now buzz the low G, but just with your lips NO MOUTHPIECE ... It takes a bit of practice. When you can do this, take a deep breath play the note and slowly bring mouthpiece (trumpet attached)to your lips, and as you make contact the note suddenly junps up to low C .. At this time you will notice how lightly the mouthpiece is against your lips.If you have taken enough air, play a scale keeping the same light pressure ... You will be amazed at how high you can play with little effort !!!! As you can see your lips play a 4th below the trumpet note . Also when you play high pieces check certain notes by playing same note on just the mouthpiece , quite often the mouthpiece note will pitch higher TOO MUCH PRESSURE .There you go no need for anymore expensive lessons .... No , only joking , but it does work...