{
  "version": 3,
  "provenance": "Independently authored sparse guitar rhythm rules: metrical placement, support of source melody, releases and harmonic changes. No training-score extraction.",
  "license": "MIT",
  "grid": "1/2",
  "lane_candidates": 24,
  "measure_candidates": 32,
  "instruments": {
    "electric": {
      "families": {
        "stabs": [
          "1/2"
        ],
        "quarter_stabs": [
          "1"
        ],
        "sustain": [
          "3"
        ],
        "broad": [
          "4"
        ],
        "short_long": [
          "1/2",
          "2"
        ],
        "long_short": [
          "2",
          "1/2"
        ]
      },
      "layers": {
        "electric": {
          "attacks": [
            0,
            2
          ],
          "families": [
            "stabs",
            "quarter_stabs",
            "sustain",
            "broad",
            "short_long",
            "long_short"
          ]
        }
      },
      "attack_spacing": "1",
      "connect_holds": true,
      "voicing_families": {
        "provenance": "Compact inversions of the actual chord: drop-two, close position, other compact open voicings, doubled triads and three-note shells. No fixed root/key or song-specific grips.",
        "rank": {
          "drop-two": 0,
          "close-position": 0,
          "compact-open": 1,
          "compact-doubled": 2,
          "three-note-shell": 0
        }
      }
    },
    "acoustic": {
      "families": {
        "quarters": [
          "1"
        ],
        "eighths": [
          "1/2"
        ],
        "quarter_eighth": [
          "1",
          "1/2"
        ],
        "eighth_quarter": [
          "1/2",
          "1"
        ]
      },
      "layers": {
        "bass": {
          "attacks": [
            1,
            2
          ],
          "families": [
            "quarters",
            "eighths",
            "quarter_eighth",
            "eighth_quarter"
          ]
        },
        "upper": {
          "attacks": [
            1,
            3
          ],
          "families": [
            "quarters",
            "eighths",
            "quarter_eighth",
            "eighth_quarter"
          ]
        }
      },
      "attack_spacing": "1/2",
      "allowed_durations": [
        "1/2",
        "1"
      ],
      "connect_holds": false,
      "voicing_families": {
        "provenance": "Transposable chord-degree orders for compact guitar voicings. Guide is the written third or suspension; terminal is the written seventh or sixth; color is the highest written extension. Apply actual alterations and omissions, never add tones. Both bass strings and both root/fifth bass roles are equal family options.",
        "triad": {
          "5/1": [
            [
              "fifth",
              "root",
              "guide"
            ],
            [
              "guide",
              "fifth",
              "root"
            ]
          ],
          "6/1": [
            [
              "root",
              "guide",
              "fifth"
            ],
            [
              "fifth",
              "root",
              "guide"
            ],
            [
              "guide",
              "fifth",
              "root"
            ]
          ],
          "5/5": [
            [
              "root",
              "guide",
              "fifth"
            ],
            [
              "guide",
              "root",
              "fifth"
            ]
          ],
          "6/5": [
            [
              "fifth",
              "root",
              "guide"
            ],
            [
              "guide",
              "fifth",
              "root"
            ],
            [
              "root",
              "guide",
              "fifth"
            ]
          ]
        },
        "tetrad": {
          "5/1": [
            [
              "fifth",
              "terminal",
              "guide"
            ],
            [
              "guide",
              "terminal",
              "root"
            ]
          ],
          "6/1": [
            [
              "terminal",
              "guide",
              "fifth"
            ],
            [
              "guide",
              "terminal",
              "root"
            ]
          ],
          "5/5": [
            [
              "root",
              "guide",
              "terminal"
            ],
            [
              "terminal",
              "guide",
              "fifth"
            ]
          ],
          "6/5": [
            [
              "guide",
              "terminal",
              "root"
            ]
          ]
        },
        "extended": {
          "5/1": [
            [
              "guide",
              "terminal",
              "color"
            ],
            [
              "color",
              "terminal",
              "guide"
            ]
          ],
          "6/1": [
            [
              "terminal",
              "guide",
              "color"
            ],
            [
              "terminal",
              "color",
              "guide"
            ]
          ],
          "5/5": [
            [
              "color",
              "guide",
              "terminal"
            ]
          ],
          "6/5": [
            [
              "guide",
              "terminal",
              "color"
            ]
          ]
        }
      }
    }
  }
}