bichromatic

Adjective

 * 1) Of two colors.
 * 2)  Employing or relating to a quarter tone scale.
 * 3) * 1998, Robert F. Gellerman, Gellerman's International Reed Organ Atlas (page 233)
 * In 1926 Straube built a Bichromatic Quartertone Harmonium for Mordecai Sandberg with white keys for the whole tones, black keys for the half tones and brown keys for the quarter tones.
 * 1)  Employing or relating to a quarter tone scale.
 * 2) * 1998, Robert F. Gellerman, Gellerman's International Reed Organ Atlas (page 233)
 * In 1926 Straube built a Bichromatic Quartertone Harmonium for Mordecai Sandberg with white keys for the whole tones, black keys for the half tones and brown keys for the quarter tones.
 * 1) * 1998, Robert F. Gellerman, Gellerman's International Reed Organ Atlas (page 233)
 * In 1926 Straube built a Bichromatic Quartertone Harmonium for Mordecai Sandberg with white keys for the whole tones, black keys for the half tones and brown keys for the quarter tones.