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Key Features
Efficient Architecture with RoPE — Large optimized 748M full attention autoregressive transformer with RoPE
Extended Sequence Length — 8k tokens fitting most compositions and enabling long-term structure generation
Premium Training Data — Trained solely on the highest-quality MIDIs from the Godzilla MIDI dataset
Optimized MIDI Encoding — Extremely efficient 3 tokens per note and 7 tokens per tri-chord
Distinct Encoding Order — Unique duration/velocity last encoding order for refined expression
Full-Range Instrumental Learning — True full-range MIDI instruments encoding for separate instrument learning
Natural Composition Endings — Outro tokens for smooth and natural musical conclusions
Best Practices
- Good prime seed MIDI is everything — trim to an exact or approximate musical phrase
- 30sec–1min (1024–1536 tokens) run time is ideal
- Remove excessive instruments — 4–5 most pronounced work best
- Don't be discouraged by generated continuations — sometimes several tries are needed
- Don't strive for perfection — try to have fun and enjoy the music
Seed MIDI
Upload a MIDI file as a seed, or leave empty for random generation
Drop a MIDI file here or click to browse
.mid, .midi, .kar
Prime Instruments
Select up to 5 instruments (overridden by custom MIDI)
Generation Options
Medium = speed, Large/Fine-Tuned = quality
Higher = more creative, Lower = more repetitive
1.0 = disabled
Orpheus works best with some music context — upload a seed MIDI or select prime instruments
Batch Previews
10 generation batches — use the Composition Builder below to add them
Composition Builder
Add or remove batches to build your final composition
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Plot will appear here
Listen to Examples