Thomas Campion’s “Chordal Counterpoint” and Tallis’s Famous Forty-Part Motet
Bibliographic record
Abstract
The compositional process behind the iconic Tallis forty-part motet, Spem in alium (ca. 1570) remains an enigma. Did he really check every pair of voices for illegal parallels? The author proposes a scenario based on Thomas Campion’s “Rule” for connecting notes in three voices above a bass. This very clever system ensures the presence of all three interval-classes above the bass (third, fifth, and root), and makes parallels impossible. The treatise was widely reprinted, and it is likely that the system was known well before its appearance around 1614. Any composer who knew this system could have grouped the melodic motions above the bass in such a way as to make the task of writing in so many parts more manageable. Campion believed that the bass was the principal melodic voice, and glimpses into the disposition of the soggetti in Tallis’s motet reveal that the bass is indeed the soggetto in the thick-textured sections.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.003 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.004 | 0.010 |
| Scholarly communication | 0.006 | 0.004 |
| Open science | 0.001 | 0.002 |
| Research integrity | 0.002 | 0.004 |
| Insufficient payload (model declined to judge) | 0.012 | 0.002 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".