This chapter records the findings of an 8-year project that followed the musical lifespan development of two young women, Maria and Isabel, as they endeavoured to become professional musicians. Drawing on the theoretical underpinning of narrative inquiry, understood both as a phenomenon and as a method, the data methods and techniques used included extensive interviews, email exchanges, and short telephone conversations generated over the period 2001–2009. The focus of the narrative construction was an interpretation of the ways in which Maria and Isabel built a discourse of self in which both description and explanation of the development of their musical lives was simultaneously present. Seeking to put into perspective both their stories and their human experience, the report on Maria and Isabel's voices draws on the metaphor of sonata form to structure the narrative through first and second themes, transitional materials, development, recapitulation, and a final coda.