Tino was this talented, charismatic, annoying, endearing trumpet player I once went to school with. We were in a brass quintet together. It seemed like every fast piece we played, Tino would say, "Guys we need to take that faster, it's right on my break." I would joke that Tino had a great double tongue ... at a metronome range of, say, 136-144. Everything else: on the break.
I'm not blessed with a fast single tongue. Thus I had to learn to double tongue at lower speeds than my friends. I think this has become an advantage.
Where am I going with all this? LEARN TO DOUBLE TONGUE SLOWLY
Instead of a gap (too fast for single tongue and too slow for double tongue)...
...have an overlap:
In other words, have a range of tempos where you can comfortably single tongue or double tongue.
Choice is power.
