tuning of all notes in real time, while retaining invariant fingering on an isomorphic keyboard. Dynamic tonality has the potential to enable new real-time tonal effects such as polyphonic tuning bends, new chord progressions, and temperament modulations, but the musical utility of these new effects has not been demonstrated. One such keyboard that can do this is the Lumatone Isomorphic Keyboard. Comparisons The Dodeka keyboard has its keys arranged along a single direction, while most other isomorphic keyboards have their keys arranged in two dimensions. On the Harmonic and Gerhard keyboards, the two smallest intervals between a key and its six adjacent keys are a minor third (3 semitones) and a major third (4 semitones). On the Wiki-Heyden and Array Mbira, the smallest intervals are a major second (2 semitones) and perfect fourth (5 semitones). On the Park keyboard, the smallest intervals are a major second (2 semitones) and a minor third (3 semitones). On the Jankó keyboard, the smallest intervals are an augmented unison (1 semitone) and a major second (2 semitones). Isomorphic keyboards can be compared and contrasted using metrics such as the thickness of an octave's swathe of buttons on the keyboard and the number of repetitions of a given note on the keyboard. Different isomorphic keyboards are suited for different uses; for example, the Fokker keyboard is well-suited to tunings of the syntonic temperament in which the tempered perfect fifth stays in a narrow range around 700 cents, whereas the Wicki keyboard is useful over both this and a much broader range of tunings. See also Array mbira Chromatic button accordion Harpejji Wicki-Hayden note layout Dodeka Keyboard Design Harmonic table note layout References External links Balanced Keyboard A modified symmetrical layout of the standard keyboard. The website shows how to build your own. Generalized Keyboard papers of Erv Wilson Demo, Demonstration of the advantages of the isomorphic keyboard (Janko version) by Paul Vandervoort. Program: "Kitten on the Keys" by Zez Confrey; explanation of the Janko note arrangement and advantages over a standard keyboard; demonstration of musical passages which are difficult or impossible to play on a standard keyboard; "C#-Major Prelude" from the Well-Tempered Clavier by J.S. Bach; Boogie-woogie rendition of "Bye Bye Blackbird". Dodeka Keyboard Another example of an isomorphic keyboard layout developed by Dodeka. クロマトーン Inspiration 9:59 #1/11 played on the Chromatone (kuromatōn / クロマトーン), a Jankó-like isomorphic keyboard. The first in a series of