Hello. I have played trumpet for a couple of months, and practice a lot. Hit my first C above the chart today I mostly do lip slurs and long tone-type exercises, and also just playing, improvising blues etc. I have listened to some recordings of my self, and my intonation isn't very good. It isn't always bad, and it isn't REALLY bad - but bad enough that I feel like I need to improve it. Can anyone give me any exercises to help this?