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Section 28.2 Avoiding Objectionable Parallels

When adding non-chord tones, one must avoid creating objectionable parallels. To avoid creating parallel 5ths and 8ves when adding non-chord tones, first identify intervals of 5ths and 8ves between voices in your original voice leading.

Figure 28.2.1. Progression with 8ves and 5ths identified

Avoid adding non-chord tones that move by step into notes separated by a 5th or 8ve.

Figure 28.2.2. Parallel 5ths and 8ves created by non-chord tones

It is best to avoid adding non-chord tones in two voices on the same beat unless they are moving in parallel 3rds or 6ths.