Two years ago, I had no issue double- and triple-tonguing. After a while, however, I seem to have issues playing quickly enough. I suspect that I have gone back to single-tonguing. How can I go back ...
It is fairly easy - although it requires a bit of strength - to bend notes downwards on a trumpet. For example playing a F#, a F, or even lower notes with all valves open. It does not sound nice, but ...