Hand-v2 pilot · fixed listening set
Cadence
Hear the forecast. Inspect both hands. Keep the verdict yours.
Example 01
First 10 seconds: supplied RH. After 10 seconds: generated RH + LH.
This is RH-prompt forecasting, not live following. The model does not hear what you play next. Short endings and weak examples are retained — no cherry-picked replacement takes. Original clip 04 is featured first at Hugo's request; original IDs and recordings are unchanged.
What has — and hasn't — been verified
391 validation windows share identical future targets. These diagnostics support conditioning sensitivity; they do not establish musical quality. The empty-prefix variant is also an out-of-distribution perturbation.
All eight examples contain newly generated RH and LH; their MIDI and MP3 files passed structural checks. Seven ended with model EOS rather than the horizon cap. A note-score review found promising harmonic continuity as well as repetition, dense textures and imperfect hand separation. It was not an auditory listening study.
The reference is an actual withheld continuation, not a model baseline or the only musically valid future. Hand labels are predicted, and this fine-tuning split is not proven unseen by Aria pretraining.
Checkpoint SHA-256: 29e8e1b…7eca3b0