For a version actually written in bass clef for tuba, publishers like Carl Fischer offer a digital edition (O5553D) for approximately Interactive Apps: BlackBinder app offers a digital version with automatic scrolling features. Carl Fischer Key Editions for Tuba
If you genuinely cannot afford the Arban method, there are legal, free resources that mimic its structure. Arban Tuba Pdf
Focuses on embouchure development, long tones, and basic rhythm. Syncopation and Dotted Notes: Exercises to develop rhythmic precision and "swing" feel. For a version actually written in bass clef
The "Arban Method" is structured to build a musician from the ground up, focusing on three critical areas: there are legal