Are you familiar with all 5 Tiers of pedal tones?
Did you even know they existed? Why is it that a pedal C is much more difficult than a pedal F? Why is a double pedal F so easy even 6th graders can play them?
Do you practice various pedal tones to get different results? Some for range? Some for tone? Some for power? If this all sounds unfamiliar then you likely haven't studied with Kurt Thompson.
Why not step into the world of the SMART Trumpet Player and begin knowing what is going on and why you would even consider practicing in the basement of the trumpet.
14 minute very detailed video tutorial