README.md

Orbitune Epoch Checkpoints

Archive of training checkpoints produced by the Orbitune epoch runs (no-replacement full-epoch training over Aria-MIDI + GigaMIDI).

Purpose

• Offload heavy checkpoints (each model.pt is ~112 MB) so local disk stays free.
• Keep a recoverable trail of model.best.pt and per-epoch milestone checkpoints.
• This repo is an archive, not a release. The published web model lives in Unjuno/orbitune-a2-512.

Layout

<run_name>/
  model.best.pt                  # best validation loss of the run
  model.pt                       # rolling checkpoint at upload time (latest/)
  milestone_ev<events>_step_<s>.pt # quarter-epoch milestones (25/50/75/100%)
  train.log                      # full training log (evidence)
  snapshots/                     # optional intermediate snapshots

Scope / license

• Research, non-commercial (CC-BY-NC-SA-4.0), same scope as orbitune-a2-512.
• Training sources: Aria-MIDI, GigaMIDI.
• Validation protocol: a2-seq512-v1, window hash 0d76ff62…, seed 10001, 98,304 events (identical across runs → numbers are comparable).

Note

docs/PUBLICATION.md still states that research checkpoints are not distributed; that document needs to be reconciled with this archive.