Novelty Estimation
CORPUS is being built in the open. Some of what you read here is live, some is still design intent. Expect it to evolve.
Novelty Estimation is the measurement behind the novelty bonus. It answers one question: how rare is this contribution within everything the corpus already holds? Because that answer directly affects what a contribution earns, this page explains the principle openly.
A note on words: we say novelty, not originality. Originality carries a romantic story about lone creators that no measurement can honor; what a machine can measure is rarity against what already exists. The distinction is argued at length in Originality Is a Story We Keep Telling on the CORPUS Journal.
Novelty is relational
A track is not novel on its own, any more than a number is large on its own. Novelty is a relationship between one piece of music and the body of music around it. The system never asks "is this creative?"; it measures how sparse the neighborhood is where your track lands, and the neighborhood is drawn from the corpus itself: tens of thousands of tracks across dozens of genres, growing as contributions come in.
Picture it as a map
Picture the corpus as a vast map, each track a point on it. Tracks that sound alike sit close together. Novelty is how much empty space surrounds your track. Land in a crowded district and your music sounds like much of what already exists: low score. Land where the map holds little, whether far out at the edge or in a quiet gap between two crowded districts, and your track adds something the corpus barely covers: high score.
Two consequences follow directly. A copy of something already in the corpus sits right next to it and scores near zero. And each upload becomes part of the map the moment it is scored, so the tenth track that sounds like your previous nine lands in the district they built and earns less each time.
How the measurement works
- Embedding. The whole track becomes a point on that map: a space where sonic similarity is distance.
- Distance. The system measures how much space separates your track from its nearest neighbors in the corpus. Close neighbors mean crowded territory; distant neighbors mean rarity.
- Percentile. That distance is ranked against the whole corpus: rarer than X percent of the corpus, novelty score X. The score is the bonus, point for point.
No model passes judgment anywhere in this chain: the score is a distance in an inspectable space, not a verdict.
A moving reference
Novelty has a shelf life: the first record to do a particular thing is new, the hundredth is a genre, the thousandth is a cliché. The corpus map is not a fixed snapshot; it grows with every contribution and drops what leaves. Your reading is taken once, at ingest, against that day's corpus, and the resulting bonus is protected for three years before it decays toward a permanent floor. See Temporal Dynamics.
What the number is not
Rarity within the corpus is not musical quality, and it is not artistic worth. A corrupt file, a field recording of a washing machine, and a visionary album can all sit in empty territory, and the geometry will not tell them apart. That is why novelty is only one dimension of the score: integrity filtering happens before any scoring, the master's craft is measured in Technical Quality, and the style-relative sound is read, without points, in The Sound Quality Reading.
Next: Your Dashboard.