__________________________________________________________________ References on the subject of microtonal keyboards... *An Elementary Treatise on Musical Intervals and Temperament* R.H.M. Bosanquet, London, 1876. ed. Rudolph Rasch, The Diapason Press, Utrecht, 1987. Douglas Keislar, "History and Principles of Microtonal Keyboards", *Computer Music Joural*, Spring 1987, pp. 18-28. Wendy Carlos, "Tuning: at the crossroads", *Computer Music Journal*, Spring 1987, pp. 29-43. Erv Wilson, "Bosanquet -- A Bridge -- A Doorway to Dialog", *Xenharmonikon 2*, ed. John Chalmers, Frog Peak Music. Erv Wilson, "On Linear Notations and the Bosanquet Keyboard", *Xenharmonikon 3*, ed. John Chalmers, Frog Peak Music. Erv Wilson, "On the Development of Intonational Systems by Extended Linear Mapping", *Xenharmonikon 3*, ed. John Chalmers, Frog Peak Music. Erv Wilson, "D'Allesandro, Like a Hurricane", *Xenharmonikon 12*, ed. John Chalmers, Frog Peak Music. Erv Wilson, "Keyboard Schemata from the Scale Tree", *The Wilson Archive*, ed. Kraig Grady, http://www.anaphoria.com/ __________________________________________________________________