Page:Pratt - The history of music (1907).djvu/72

 [** this diagram wasn't proofed in P1, so F* should check it carefully!][** Can't figure out how to do the staff and music notes but formatted the rest in F1; left out the italics markup.]

The Hexachord-System

_ _ _ _ _ _ _        1.  2.  3.  4.  5.  6.  7.      _     |               E''. .  .   .   .   .   la. |    |                                                     |     |      _ _ _ _                                        |     |     |         D''. .  .   .   .  la  sol. |    |     |                                               |     |     |                                              s|     |     |         C''. .  .   .   .  sol  fa. u|    |     |                                              p|     |     |                                              e|   7.|     |         B''. .  .   .   .       mi. r|    |     |                                              a|     |     |                                              c|     |   6.|           Bb. .  .   .   .   fa. u|    |     |                                              t|     |     |        _                                     æ| | H  |       | A''. .  .   .   la  mi  re. |    | e   |       |                                       | | x  |       |                                       | | a  |       | G'. .  .   .   sol re  ut. |_    |_c _ |_ _ _ _| h  |       |                                        _ o  | _ _ _ | F'. .  .   .   fa  ut. .  |       r        5. |                                      |      _d _ _ _ _ _ |                                       | | a          | E'. .  .   la  mi. . .   | H    |       H     |                                       | e   | m    _e_ _ _|                                       | x   | o   | x     | D'. .  la  sol re. . .   | a    | l   | a     |                                       | c   | l   | c     |                                      a| h  4.| i   | h     |_C'. .  sol fa  ut. .  . c| o    | a   | o                                            u| r    |     | r                                            t| d    |   3.| d       B'. .      mi. .  .   . æ| a   |     | a                                             | |    |                                               | d    |     | n         Bb. .  fa. .  .   .  | u    |     | a                                             | r   |     | t      _                                      | a   |     | u     | A'. la  mi  re. .  .   .  |_     |     | r     | |    | a     |                                        _ |_ _ _|_l_ _ _| G. sol re  ut. .  .   .  |           | i     |                                       | | a    |                                       | - - - -| F. fa  ut. . .   .   .  |                 2.|                                       |      _ _ _ _ _ _ _|                                       |     |             | E     la  mi. .  .  .   .   .  |     |             |                                       |     |             |                                       |     |             | D     sol re. .  .  .   .   .  |     |             |                                       |     |             |                                      g|     |             |_C     fa  ut. .  .  .   .   . r|     |                                                    a|     |                                                    v|   1.|               B     mi. .  .   .  .   .   . e|     |                                                    s|     |                                                     | |              A     re. .  .   .  .   .   .  |     |                                                     |     |                                                     |     |_ _ _ _ _ [Greek: G] ut. .  .   .  .   .   .  |_

Hexachords 1, 4 and 7 are called hard because they contain B, which was distinguished as B durum; hexachords 3 and 6 are called soft because they contain Bb or B molle (or B rotundum); and hexachords 2 and 5 are called natural because they contain neither B nor Bb.