Octave species various available intervals could be combined in any order, even restricting species to just the diatonic genus would result in twelve ways of dividing the octave (and his 17th-century editor, Marcus Meibom, pointed out that the actual number is 21), but "only seven species or forms are melodic and symphonic" . Those octave species that cannot be mapped onto the system are therefore rejected . In chant theory beginning in the 9th century, the "New Exposition" of the composite treatise called "Alia musica" developed an eightfold modal system from the seven diatonic octave species of ancient Greek theory, transmitted to
Octave Chanute Octave Chanute Octave Chanute (February 18, 1832, Paris – November 23, 1910, Chicago, Illinois) was an American civil engineer and aviation pioneer, born in France. He provided many budding enthusiasts, including the Wright brothers, with help and advice, and helped to publicize their flying experiments. At his death he was hailed as the father of aviation and the heavier-than-air flying machine. Octave Chanute was the son of Elise and Joseph Chanut, professor at the Collège de France. He emigrated with his father to the United States of America in 1838, when the former was named Vice-President at Jefferson College in