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 * Nicola Vicentino (1511-1576): adaptive JI, 31-ET
 * Leonhard Euler (1707-1783): tonespace (5-limit)
 * Hermann von Helmholtz (1821-1894): psychoacoustics
 * RHM Bosanquet (1841-1913): regular mapping, generalized keyboard
 * Shohe Tanaka (1862-1945): 5-limit tonespace (triangular projection)
 * Adriaan Fokker (1887-1972): periodicity blocks, matrices
 * Harry Partch (1901-1974): extended JI
 * Erv Wilson (1928-2016): extended tonespace & projections, scale tree
 * mailing list (1994- ): complete theory of regular temperaments
   * Gene Ward Smith (1947-2021): wedge invariants
   * Paul Erlich (1972- ): harmonic entropy, TOP tuning