This is probably a very stupid question, I've only recently took a serious look at the physics of the tubes in the Euphonium, and am now consciously aware of how the 1st valve adds 1 note, while the 2nd valve adds a semitone. With that awareness, I am now confused as to the fingering for the G in the octave above the bass clef. I've always used valve 2 for A and G in that range, but.... how and why is that possible?
Then Googling around, I've seen the fingering being valve 1 and 2, which made sense. But I've also seen valve 3 being recommended to play that G. So here I am, here asking a stupid question after playing the eupho for so long and not being aware of the physics or even the logic behind producing a high G with all the different fingering.
I am using a 3 valve student model Yamaha with a small shank, if that's relevant.