Example image of eyePlorer eyePlorer map for 'Pitch space': Music theory Dimension Graph (mathematics) Group (mathematics) Lattice (group) Pitch class Pitch class space Chordal space Modulatory space Musical Instrument Digital Interface Arthur von Oettingen Bernhard Riemann H. Christopher Longuet-Higgins Hermann von Helmholtz Hugo Riemann Leonhard Euler Tonnetz Cartesian coordinate system James Tenney W. A. Mathieu Helix Octave Gamelan Michael Tenzer Pseudo-octave Emancipation of the dissonance Fred Lerdahl Spiral array model Transcendent principle 1739 in science Steps and skips Maximal evenness Chromatic circle Ralph Shapey Arthur Berger Melodic expectation Dynamic tonality Pitch (music) Audio timescale-pitch modification Perfect fifth Musical tuning