The numbers are closer to public. A federal judge has vacated the sealing order protecting Udio’s training data in the Sony Music Entertainment copyright litigation, according to reporting on the ruling. Udio had argued that disclosing the volume of copyrighted recordings used in training its AI music models would cause commercial harm. The court reportedly rejected that argument. The actual figures haven’t appeared in public filings yet, but the legal shield is gone.
The background: Sony Music Entertainment, Universal Music Group, and Warner Music Group filed copyright infringement suits against both Udio and Suno, alleging the companies used copyrighted recordings to train their AI models without authorization. That litigation is established public record. The specific question of how many recordings, what the case calls “training numbers”, has been sealed since early in the proceedings. Udio fought to keep that seal. According to reports, the court disagreed.
Verdict
Why the training numbers matter. In copyright litigation, scale isn’t just context, it’s potentially the core damages variable. If an AI music model was trained on, say, tens of millions of copyrighted recordings, the statutory damages math under US copyright law gets large very quickly. Udio and Suno haven’t been shy about the capabilities their models produce. The question the record labels are pressing is what those capabilities cost, specifically, whether the companies paid for the underlying material that made the models possible.
Suno faces parallel litigation on the same theory. Its training data has similarly been a contested disclosure issue. The Udio ruling doesn’t directly bind the Suno case, but it establishes a judicial posture in this litigation context: courts aren’t treating training data volume as obviously protectable commercial information when it’s the central factual question in an infringement case. That’s a pattern worth tracking.
Don’t expect the training figures to appear immediately. Vacating a sealing order removes the barrier to disclosure; it doesn’t compel immediate filing of the previously sealed materials. The specific procedural timeline, when the figures actually become part of the public record, depends on subsequent filings and court orders that weren’t available at the time of this brief. This story has a second chapter.
What to Watch
The real question is what the numbers show when they do appear. If the training data volume is in the range the record labels are suggesting in their filings, it changes the damages calculus for the entire AI music sector. Investors who priced Suno at $5.4 billion in March are carrying litigation exposure that the sealed numbers will soon help quantify. The Udio ruling is the first crack in the wall.