Roy Hart's revolutionary work on the human voice through extended vocal technique and the Wolfsohn-Hart tradition has influenced several generations of practitioners. Hart's outstanding contribution to vocal research, practice and performance stretched over 20 years until his untimely death in 1975, and his vocal training produced performers with extraordinary and highly expressive vocal ranges. He founded a theatre company, Roy Hart Theatre, that brought his ideas to realisation in groundbreaking works. His influence, through his own use of the voice for theatre and music and its embodiment in his company, was widespread, attracting the interest of directors such as Peter Brook, Jerzy Grotowski and Jean-Louis Barrault. This book combines: a detailed biography giving the social and artistic context of Hart's work and that of the early Roy Hart Theatre an exploration of Hart's own writings on his work, combined with a review of articles by his wife Dorothy Hart and in-depth interviews a stylistic analysis of his key works, including The Bacchae, and, L'Economiste and Biodrame, and their critical reception pathways into some of the practical exercises devised by close collaborators of Roy Hart and practitioners of the Roy Hart Theatre Tradition. As a first step towards critical understanding, and as an initial exploration before going on to further, primary research, Routledge Performance Practitioners offer unbeatable value for today's student.