This message was contributed by Angela on 10/11/08.
It was in reply to this message: Frog
posted by Steve Whitehead on 23/9/08.
Sorry we're only just getting round to answer your questions. Buzzing is good to a certain extent as it gets your lips vibrating. The frog you talk about sounds like a problem with your aperture. Are you supporting the corners of your mouth? Try doing lots of tongueing exercises - long lines of fast semiquavers across the range of the instrument but starting in the middle register.
Range and endurance is only ever improved by the most obvious thing - keeping the trumpet on your face for longer periods of time and playing in the high and pedal registers. Wish there was a quicker way but I'm afraid there isn't. Make sure you use the breath to it's full capacity i.e. try to extend phrase lengths and don't take another breath until you're gasping for air. That normally helps with any stamina issues as we tend to fill up with more air when we don't really need to.
Hope you get better soon,