Introduction; Part I. An Outline Topography of Musical Accessibility: 1. What is musical accessibility?; 2. Society, atonality, psychology; Part II. Accessibility Discourse in Rock, and Cultural Change: Case study 1; 3. 'Prog' rock/punk rock – sophistication, directness and shock; 4. Zeitgeist – accessibility in flux; Part III. A Valiant Failure? New Art Music and the People: Case study 2; 5. Vaughan Williams' National Music in context; 6. Art music, vernacular music and accessibility; Part IV. Accessibility, Identity and Social Action: Case study 3a; 7. Accessibility in action – Bahia, Brazil; Case study 3b; 8. Samba in Wales – how is adopted music accessible?; Part V. Themes: 9. Some key concepts; Postscript; Glossary of neologisms.