code: function transform (nt, st, pt, ctx, obj) {
    switch (arguments.length) {
      case 0: return transform
      case 1:
      case 2:
      case 3: return transformer(nt, st, pt)
      case 4: return function (o) { return transformer(nt, st, pt)(ctx, o) }
      default: return transformer(nt, st, pt)(ctx, obj)
    }
  }
docs: Transform a musical structure
  
  This is probably the most important function. It allows complex
  transformations of musical structures using three functions
  
  @param {Function} elTransform - element transform function
  @param {Function} seqTransform - sequential structure transform function
  @param {Function} parTransform - simultaneous structure transform function
  @param {*} ctx - an additional object passed to transform functions
  @param {Object} score - the score to transform
  @return {*} the result of the transformation