I think it's funny to watch folks on tubenet get so excited about hearing or seeing their favorite tuba player using an instrument other than what they've traditionally come to be associated with which (at least on tubenet) is usually assumed to be a 6/4 CC tuba.
Most of the players referred to on tubenet are pros playing in major US orchestras. In some cases, their orchestras own instruments for their use, meaning (like bloke said), they play things because they have access to them. Still, most players on that level own many tubas so that they have options for themselves and select the best equipment to suit the task at hand. So, I don't think anyone should find it so shocking that ______(insert favorite player here)______ decided to play a particular tuba in a particular situation.
We talk about these guys playing BBb tubas over CC tubas as if they've got to sit down with the Rubank Elementary Method and learn the fingerings. We're talking about some of the finest orchestral tuba players in the world. As DP said, these guys can play anything without a second thought, so it's funny that we're so impressed when they can play Meistersinger on F tuba or play Mahler, Bruckner, or Prokofiev or a BBb tuba and still have a "world class sound" in a world class orchestra.






