The thesis for the Master of Music degree in Orchestral Instruments consists of two full-length recitals. My two full-length recitals were performed on Sunday, March 25, 2018, and Friday, March 15, 2019. The main research goal and contribution this thesis provides to the field of music performance on the euphonium is centred around repertoire available for the instrument over the period of the twentieth and twenty-first centuries. Being a fairly newer instrument, invented in the mid-1800s, there is a considerably smaller range of repertoire compared to that of other instruments. The main goals relating to personal growth featured in this thesis from “Recital One” to “Recital Two” focused on the development of endurance, playing technique, a...