EXTEMPORE PLAYING - online tutorial

40 Lessons in how to correctly play improvisations.

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The Period                                   29
The kind of period we are considering (called the 'parallel') is very frequently found in classical music. The following is an example:
It will be seen that the two members are identical, except that for the perfect cadence at the conclusion of the consequent is substituted the semi-cadence at the end of the antecedent. This should be carefully noted. It is, in general, the reversing of the perfect cadence; V-I now becomes I-V. There are, however, many exceptions. The V may be preceded by several other chords. For it may be substituted some other chord at this point; but it will be convenient here to retain it, preceded either by I, or by IV or II.
Many other forms of period-construction will be con­sidered when we come to deal with melodic detail.
Exercise II.
(a)   Play the successions given at the beginning of this chapter, in every major key.
(b)   Invent other sequential uses of six-four chords.
(c)   Play the scale-harmonization given above, in every key.
(d)   Invent numerous parallel periods in various keys, using the chord material now available.
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