{
  "version": 1,
  "provenance": "Independently authored general composition policy; no validation-score measurements or material.",
  "license": "MIT",
  "roles": {
    "acoustic_solo": {},
    "electric_solo": {},
    "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": 144
  }
}