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| Property | Value |
|---|---|
| Base Model | Moonbeam S (309M params) |
| Tuning System | 1200-TET (1200 pitch classes/octave) |
| Cents per Step | 1.00 |
| Total Parameters | ~312M |
| Architecture | LLaMA + MRA + GRU sub-decoder |
| GRU Vocab Size | 3529 |
(onset, duration, octave, pitch_class, instrument, velocity)pitch_class ∈ {0, 1, ..., 1199} — each value = 1 centoctave ∈ {0, 1, ..., 10} — 11 octaves1@article{guo2025moonbeam,
2 title={Moonbeam: A MIDI Foundation Model},
3 author={Guo, Zixun and Dixon, Simon},
4 journal={arXiv preprint arXiv:2505.15559},
5 year={2025}
6}