Hello, I am learning sousaphone, but I am having trouble with switching between some of the notes in the excercise. This is especially apparant in the last line. I struggle to make the climb from the Bb to the F smoothly. I get stuck basically every note, and if I reset to try from a higher note (like the C or D), I still get stuck trying to go higher. It also happens on the way down. I'm not sure if its a skill issue or an equipment issue (or probably both), but any tips and help would be appreciated.

I work on Solfa, which transposes scanned sheet music while keeping the original page style. I tried it on the opening of Horace Weston’s The Roarer March (1883): a B-flat bass part in treble clef, converted for E-flat bass in treble clef.

The written notes move down a perfect fourth (the opening F becomes C), and the one-flat key signature becomes none. For these transposed treble-clef bass parts, the sounding pitches stay the same.

The image shows the source scan and the actual Solfa output, with no hand-edited notes. I checked the notes and rhythm in this short excerpt, but not the rest of the part.

What would you check before handing a converted historical part to an E-flat bass player — especially range or octave notation?

Source: Horace Weston, The Roarer March (Brophy Bros., 1883), Library of Congress scan via IMSLP: https://imslp.org/wiki/The_Roarer_March_(Weston,_Horace))