XI. Counterpoint Terminology
Species (OTH)
Five species of OTH counterpoint, adapted from the Fuxian tradition:
| Species | Notes/chord | Motions | Non-chord tones |
|---|---|---|---|
| 1st | 1 | single edge | none |
| 2nd | 2 | single edge | passing, anticipation |
| 3rd | 4 | single edge | passing, neighbor, anticipation, cambiata |
| 4th | mixed | single edge + fiber | suspension |
| 5th | free | all motion types | all categories |
Shadow Note
A non-chord tone that belongs to the step-size multiset of a sister orbit (an orbit sharing the same multiset). For example, a pitch from Q877’s set sounded over a Q777 chord. Shadow notes are not errors — they are deliberate coloristic devices.
Orbit Persistence
Three or more consecutive chord-graph edges within the same orbit. The OTH analogue of parallel fifths — a voice-fusion risk to be managed deliberately.