Isomorphic OmniScriptum SRL Isomorphic keyboard: Input device, Interval (music), Array, Erv Wilson, Janko keyboard, Generalized keyboard

Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. An isomorphic keyboard is a musical input device consisting of a two-dimensional array of note-controlling elements (such as buttons or keys) on which any given sequence and/or combination of musical intervals has the "same shape" on the keyboard wherever it occurs - within a key, across keys, across octaves, and across tunings. Isomorphic keyboards were developed by Bosanquet (1875), Janko (1882), Wicki (1896), Fokker (1951), and Wesley (2001). The keyboards of Bosanquet and Erv Wilson are also known as generalized keyboards.