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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.