A question for everyone out of curiosity. What is the single most moving live performance that you've ever personally seen by a euphoniumist and why? Can be solo, chamber, or even large ensemble.
I'll start off. In 1999 I attended the Rafael Mendez Brass Institute in Cincinnati. The best part of the week was that the euphoniumists (about 8 of us) got to spend about 4 hours a day in a masterclass with Brian Bowman (as we were euphoniumists, there wasn't much else for us to do, it was more of an orchestral-focused seminar). In an afternoon masterclass, Brian was working with a grad student on the opening of the Bocallari "Fantasia di Concerto." The student had great chops, but Brian wanted him to sing more. He picked up his horn and demonstrated the first 4 bars. The rest of us (all about graduate level and experienced players) collectively went "holy crap." Though only about 20 seconds long, it was the most beautiful, sincere moment of music I've ever heard performed on a brass instrument. It was all we could talk about the rest of the week. It completely reshaped the way I approached the instrument.
Looking forward to hearing about your experiences!