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130 Extempore Playing
order and symmetry of its own, giving a subtle and elusive charm. Let the student understand that groups of twos, threes, fours and fives may be interchanged, and that he may arrange them in any way that offers interest. Here
are some groupings:
A slight increase of speed is made with the larger groups, and a corresponding decrease with the smaller ones. The minims (half-notes) are used for convenience, but are not to be read strictly.
(a) Play the harmonized scales, as given on p. 100, first in even time, then with various groupings of twos, threes, etc.
(b) Play the scale of mode I on twelve different pitches, using in every case the signature of a whole tone below the keynote.
(c) Play all the other scales in a similar manner.
(d) Play the harmonization of the four modes given, each on twelve different pitches.
(e) Invent and play various rhythmic arrangements of groups of two, three, four and five notes; indicate them by tapping upon a table.
(f) Play phrases in each of the twelve modes, with natural pitch; use various rhythmic groupings, ending each with a cadence as shown in the table of harmonies.
(g) Starting on the note D, play eight notes in succession, first in mode I, and then in the other modes, in each case commencing on the same pitch, and obtaining the necessary intervals by using the black notes.
(h) Play harmonic phrases in each mode, using in every case D as keynote.
(i) Do the same on every successive degree of the scale.