- Tonnetz
The Tonnetz (German for "tone-network") is a conceptual lattice
diagram invented byLeonhard Euler in 1739 that shows a two-dimensional tonalpitch space created by the network of relationships between musical pitches injust intonation . The space was rediscovered in 1866 byArthur von Oettingen . The influential musicologistHugo Riemann explored the capacity of the space to chart harmonic motion between chords and modulation between keys. Recent research (by music psychologist Carol Krumhansl, music theoristDavid Lewin , and others) substitutes equal temperament and enharmonic equivalence for just intonation, and explores the group-theoretic and topological aspects of the space.The equal temperament "Tonnetz" can be rolled into the shape of a
torus (the shape of a ring doughnut, a hula hoop or an inflated tire), showing that it has atopology equivalent to S1×S1.See also
*
Just intonation
*Pitch space
*Musical tuning
*Tuning theory
*Neo-Riemannian music theory , including the study of thePLR group External links
* [http://members.cox.net/dysartp/ Music harmony and donuts] by Paul Dysart
* [http://www.robertkelleyphd.com/justtonnetz.htm Charting Enharmonicism on the Just-Intonation Tonnetz] by Robert T. Kelley
* [http://www.cis.upenn.edu/~lsaul/papers/visual_icmc05.pdf Visualization of low-dimensional structure in tonal pitch space] (.pdf format)
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