| Re: why?
Morris,
You might want to look at your tongue level. I was experiencing this same thing a few months back. After some research, soul searching and discussion with my trumpet instructor, the latter of the three being the most beneficial, I decided that, when I was slurring, my tongue went flat in my mouth. When I was tonguing, I was using a solid tongue arch and adjusting it according to the note I was playing (Think "EE" for high notes and "AH" for lower notes). Try raising the back of the tongue as you ascend and lowering it as you descend. You should find that it is much easier to distinguish the intervals when slurring.
Mike |