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Chapter 10. Harmonic progression. Harmonic Progression. Defined as the movement from one chord to the next; a succession of chords or chord progression A principal organizing force. Root Relationships. The relationship of chords to the prevailing tonality
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Chapter 10 Harmonic progression
Harmonic Progression • Defined as the movement from one chord to the next; a succession of chords or chord progression • A principal organizing force
Root Relationships • The relationship of chords to the prevailing tonality • The intervals formed by the roots of adjacent chords
Chord Progressions • Circle progression • Non-circle progression • Ascending fifths • Ascending seconds • Descending thirds
Circle Progression • The most common and strongest • Adjacent chord roots in ascending fourth or descending fifth (same note when inverted) • The basis of all harmonic progression • Found in succession: ii-V-I, or even vi-ii-V-I
Circle Progression • Can derive many harmonic patterns from this progression: I-IV-vii°-iii-vi-ii-V-I, and many can be used based on this progression. Note that the progression starts and ends on the tonic (see figure 10.2) in book. • Circle progression is a drive toward the tonic
Non-Circle Progression • Anything that isn’t circle • Used in conjunction with circle progression • Adds variety to the music
Ascending Fifths • I-V, IV-I, V-ii, vi-iii, iii-viiº, and ii-vi • Can be descending fourth also • Provides relief from the constant motion of circle progression • Most common is I-V • Half cadence is a good example of this progression
Ascending Seconds • Adjacent chords whose roots are a second apart: IV-V, V-vi, I-ii, ii-iii, iii-IV, and viiº-I • Used to prepare a shift from the circle progression to another • The vii° chord is often used in a dominant function as a vii°6 to a I
Descending Thirds • I-vi, vi-IV, IV-ii, iii-I, and V-iii • Chords whose roots are a third apart • Provide contrast and facilitate change from circle progression to another • Used in harmonic movement away from the tonic or in a longer chord series
Tonic 6/4 Triad • Used in a cadential manner as in I6/4-V-I • A decoration of the V chord that follows it
Repeated Chords • No progression takes place with repeated chords, whether inverted or not
Harmonic Rhythm • The frequency of harmonic changes in a composition • Typically defines the meter • Can be slow or fast in its changes
Harmonizing a Chorale Phrase • You must use half or authentic cadences for the final two notes of each phrase • You should use circle progressions throughout each phrase • Harmonize each melody note with one chord. It is possible to repeat chords, but add inversions for variety • Use first inversion chords to make a smoother bass line • Shape the bass line carefully to make it a singable melodic line. • Avoid overuse of ascending third and descending second progressions