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Section 26.10 Special Situations

Avoid parallel fifths when the roots of triads are a second apart, as in the following examples:

  1. \(\left.\text{ii}^{6}\right.\) to \(\left.\text{I}^{6}_{4}\right.\) (see the first measure in the examples below)

  2. \(\left.\text{I}\right.\) to \(\left.\text{vii}^{\circ}{}^{6}_{4}\right.\) (see the second measure the in examples below)

Figure 26.10.1 Parallel fifths when roots are a 2nd apart
Figure 26.10.2 Parallel fourths as a corrective when roots are a 2nd apart

In any such situation where the roots are a second apart (even if the chords are in inversion), revoice each chord so the 5th of the chord is below the root of the chord in the upper voices