Janko Keyboard:</p>
I've just come across the Janko keyboard which has been around for sometime (1882) but has never really taken off.</p>
Taken from Wikipedia:</p>
Based on the premise that the hand can barely stretch more than a 9th on the piano, and that all scales</p>
Each vertical column of keys is a half step away from its
neighboring columns, and on each horizontal row of keys the interval
from one note to the next is a whole step. This key layout results in
all chords and scales having the same "shape" on the keyboard with the
same fingerings regardless of key, unlike a traditional keyboard.</p>
For an 88 note (full size) keyboard, there would be 264 keys in
total, with each note playable by 3 keys in vertical alignment. In the
picture, the white keys have been coloured to show how the keys are
interconnected.</p>

More here: http://en.wikipedia.org/wiki/Janko_keyboard</p>
Bilinear Chromatic Keyboard</p><p align="left"><font face="Arial" size="3">The Bilinear Chromatic Keyboard is
an alternative design to
the conventional keyboard layout, requiring only two patterns for any scale, chord, arpeggio, melody
or harmony (compared to the twelve patterns required for the traditional
diatonic keyboard).</font> </p>
<p align="left"><font face="Arial" size="3">Although the arrangement of notes is
chromatic, keys are coloured in the same way as traditional keyboard keys, with
white keys corresponding to the C major scale:</font></p><p align="left">

Anyone tried any of these wierd and wonderful keyboard arrangements, particularly the Janko? Would be interesting to try out a Janko keyboard based organ with Janko foot pedals.</p>
Anymore arrangements of keyboards you've come across?</p>
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