piano-midi-monitor/src/services/spans.json

[
  {
    "startKey": 36,
    "endKey": 84
  },
  {
    "startKey": 36,
    "endKey": 89
  },
  {
    "startKey": 36,
    "endKey": 96
  },
  {
    "startKey": 28,
    "endKey": 103
  },
  {
    "startKey": 21,
    "endKey": 108
  },
  {
    "startKey": 12,
    "endKey": 108
  },
  {
    "startKey": 12,
    "endKey": 119
  },
  {
    "startKey": 0,
    "endKey": 127
  }
]