Enharmonic keyboard

[6][page needed] Barbieri (2007), in his turn, raised the objection that this use of the term is contrary to early theoretical works.

[10][11][12] One of the first instruments with an enharmonic keyboard was the archicembalo built by Nicola Vicentino, an Italian Renaissance composer and music theorist.

Among them are Johann Kaspar Kerll's teacher, Giovanni Valentini, who played a harpsichord with 77 keys for 4 octaves (19 keys per octave plus one extra C), and Friedrich Suppig,[16][page needed] published one of the definitive works for an instrument with an enharmonic keyboard: The Fantasia of the Labyrinthus Musicus, which is a multi-sectional composition that makes use of all 24 keys and is intended for a keyboard with 31 notes per octave and pure major thirds.

Isomorphic note-layouts are a class of enharmonic keyboard, opened in 1721 by Ivo Salzinger's Tastatura nova perfecta, Germany.

[17] One isomorphic note-layout, the Wicki, when mapped to a hexagonal array of buttons, is particularly well-suited to the control of enharmonic scales.

Odoevsky's enharmonic klavitsin (Russia, 1864), in fact piano with 19 keys per octave
Vicentino 's enharmonic keyboard (Italy, 1555) with version of tuning in cents
Schematic representation of Fokker's microtonal keyboard [ 13 ] for a 31 EDO pipe organ (Fokker organ) with two manuals and pedal, built by him
Joseph Alley's enharmonic reed organ (U.S., c. 1867 , 5 limit J.I. non-closed)
von Oettingen's orthotonophonium (Germany, 1914). 53 EDO , 60 keys per octave