code: function convertAbcToJson(input) {
    var outputData = {};
    var parser = new Parser();
    parser.parse(input);
    var tune = parser.getTune();
    outputData = createJsonFromLines(tune);
    outputData.id = getJsonId(input);
  
    return JSON.stringify(outputData);
  }
docs: Returns the abc notation string from given input
  @param {object} input - The parsed input from input file
  @returns {string}