Following Lewin's revival (in GMIT) of Hugo Riemann's three contextual inversion operations on triads (parallel, relative, and Leittonwechsel) as formal transformations, the branch of transformation theory called Neo-Riemannian theory was popularized by Brian Hyer (1995), Michael Kevin Mooney (1996), Richard Cohn (1997), and an entire issue of the Journal of Music Theory (42/2, 1998).
Key West | Key West, Florida | Key Club | Francis Scott Key | Key Biscayne | Key Largo | John Key | Key Largo (film) | Key | Chroma key | Key West, Iowa | Key Stage 3 | Key of Solomon | Chroma Key | The Skeleton Key | Relative Silence | Public key certificate | Key Stage 2 | Key (company) | Internet Key Exchange | The Glass Key | Philip Barton Key | key | Gold Key Comics | Cedar Key | The Glass Key (1942 film) | Telegraph key | Songs in the Key of Life | slack-key guitar | Ryan Key |