Hi Joe. It`s normal for even the most extreme high note freaks to get smaller in sound as they get higher. This cut off point as I call it is normally between high G and B flat. Some players can play flat out to these notes but no higher, players that can play higher diminish in volume the higher they play. (They only sound loud because of the range they are playing in, not the volume they are playing at!) Whatever your goals are on the trumpet, remember that you are a musician. Al Porcino once said ``play big, not loud`` I hope this helps. remember, trying to imitate a jumbo jet taking off has no place in music! P.S. take a look at Arnold Jacobs` book `song and wind` (wind song press) some useful tips, not just on high playing!