Baritone - Music: Practice Theory Stack Exchange Treble clef is a different story -- octave-above-the-fundamental middle c, for a Bb cornet sounds Bb 1 step below; for a baritone euph it sounds a major 9th lower, and for a BBb tuba, it sounds 2 octaves and one step lower ]* *Of course the baritone can play the fundamental! It may depend on the player, however
Size difference between Baritone Horn and Euphonium Both Laurence user 19146 are incorrect the difference is that the baritone has a cylindrical bore, and the euphonium is conical the conical bore forces the euphonium into a slightly bigger frame, but this difference is too small to be used to differentiate, especially when comparing a large-bore baritone to a small-bore euphonium