A stylistic analysis of John Stevens' second brass quintet, Fabrics, which discusses the composer's use of orchestration, harmonic language, rhythmic activity, melodic and formal considerations, and performance practice issues. Collaboration between composer and performer is investigated, particularly through Stevens' status as member of the Wisconsin Brass Quintet, the ensemble for which Fabrics was composed. Biographical information about Stevens and the Wisconsin Brass Quintet is provided, with appendices providing information regarding Stevens' activities as composer and performer and the activities of the Wisconsin Brass Quintet. Stevens was extensively interviewed as source material for this dissertation.