{
  "version": 1,
  "provenance": "Independently authored general composition policy; no validation-score measurements or material.",
  "license": "MIT",
  "roles": {
    "acoustic_solo": {"seed": "acoustic", "register_offset": 0, "preferred_features": ["rhythmic_seed", "opening_fragment", "characteristic_interval", "contour_seed"], "register_motion": [0, 5, -3, 2]},
    "electric_solo": {"seed": "electric", "register_offset": 12, "preferred_features": ["characteristic_interval", "contour_seed", "rhythmic_seed", "opening_fragment"], "register_motion": [0, -4, 5, 0]},
    "acoustic_accompaniment": {"seed": "acoustic_comp", "bass": "primary", "center": 53},
    "electric_accompaniment": {"seed": "electric_comp", "bass": "essential", "center": 60},
    "electric_melody": {"seed": "head"},
    "vocal_melody": {"seed": "voice"}
  },
  "difficulty": {"name": "moderate", "triplet_max_bpm": 160, "sixteenth_max_bpm": 112, "burst_attacks": 4}
}