An "updated" PDF of the Arban tuba method could refer to:
There is no official Arban for Tuba revised by Arban himself (he died before tuba was common in solo repertoire). So "updated" usually means a modern editor’s revision.
The original Arban was written for Cornet/Trumpet. A "Complete Method for Tuba" (like the famous Young/Jacobs edition) features: arban complete method for tuba pdf upd
If the "UPD" in your search refers to "Updated":
The original trumpet version has been transposed and adapted for tuba in bass clef (sometimes treble clef for B♭ tuba). Several editions exist: An "updated" PDF of the Arban tuba method could refer to:
Arban is famous for its rigorous tonguing exercises.
When you search for arban complete method for tuba pdf upd, you are likely looking for one of two specific editions. Be careful: There is no official Arban for Tuba revised
1. The Wesley Jacobs / Jerry Young Edition (Alfred Music) This is the gold standard. Updated in the 2000s, this version re-engraves the entire method down an octave (or two) into the proper tuba range. It removes the piccolo trumpet high notes and adds low-register fingerings. If you see a PDF of this, it is likely a scanned copy—and it is copyright protected. Alfred Music sells the physical copy and an official e-book.
2. The Public Domain "Transposed" Versions (IMSLP) Because the original Arban is public domain, you can find free PDFs of the Cornet method easily. Some well-meaning musician has manually added "T.C." (Treble Clef) or "B.C." (Bass Clef) markings. These are hit-or-miss. They often keep the original octaves, meaning half the etudes are squeaking above the staff.