Journal Article Cage's Sonatas and Interludes for Prepared Piano: Performance, Hearing and Analysis Get access Jeffrey Perry Jeffrey Perry Search for other works by this author on: Oxford Academic Google Scholar Music Theory Spectrum, Volume 27, Issue 1, Spring 2005, Pages 35–66, https://doi.org/10.1525/mts.2005.27.1.35 Published: 01 March 2005