The Lambdoma Keyboard is a large-scale harmonic tone generator based on Pythagorean theory. This looks fantastically crunk and likely a source of almost infinite mayhem for the more, um, esoterically inclined reader. Check out the video demonstration by Barbara Hero, its inventor, below. (They can be purchased from the site.) Here’s Barbara on her invention (bolds mine):
The Lambdoma Matrix is attributed to the philosopher Pythagoras (500 bc) who spent over twenty years as an Egyptian initiate. The concept of the Lambdoma Matrix in the present age is relatively unknown, and is not cited in most dictionaries. On the surface, it appears to be nothing more than a mathematical multiplication and division table. On a closer look however, it bears a one-to-one relationship to musical intervals in a very specific harmonic series. Because of its numerical framework of ratios, it can be translated into frequencies of audible sound. The Lambdoma bears relationships to aromatics, chemistry, crystallography, cybernetics, art, music, geometry, all of which may be explored by those interested in the above disciplines. The Lambdoma bears mathematical relationships to Issac Newton, the Diophantine equations and the Farey series, as well as in the present century to Georg Cantor…
Players of these keyboards have experienced increased physical comfort and spiritual awareness within which they were able to learn answers to their questions including their life’s purpose and how to become more spiritually aware. The diamond-shaped Keyboard, with 64 keys, produces harmonic stereo intervals, with the second tone relating to the player’s chosen fundamental, based upon the whole-number ratios of the Lambdoma Matrix. When accompanied by a PC (not included) the keyboard may used as a device for sound therapy, musical composition and performance. The keyboard is fully software programmable and is both DOS/Windows and Amiga compatible. Additional software will be available for programming the midi interface. The unit comes with a user manual. Eight color-coded overlays placed over the keys provide visual cues on musical notation, frequencies, harmonics and solfegio encoded into the keys. The versatile electronic keyboard is constructed in an attractive and durable diamond-shaped, aluminum encasement suitable for on-the-road use.