They have to play in pairs
Its obviously number one. How can they hold the trumpet while blowing if not in the beak, mouth or whatever its called.
Your lips do important work in making a trumpet play. Dolphins don’t have the fine control over their lips that would be necessary. Maybe the blowhole does?
Idk about dolphins, but I really don’t have great control over my blowhole…
distant sound of something similar to someone blowing over the top of a coke bottle
I mean, you toot with your mouth, not your nose, so 1.
A dolphin would likely play something more like a trombone with an articulating system of pipes that could be played through vigorous contortions of the body. Think playing a trombone but with a hula hooping/swimming motion. Perhaps a small lever could extend out to the dolphin flipper that would allow nuanced fine pitch control with lateral contortions of the dolphin’s flipper.