CAITLIN: A Musical Program Auralisation Tool to Assist Novice Programmers with Debugging. Early experiments have suggested that program auralization can convey information about program structure [5]. Languages like Pascal contain classes of construct that are similar in nature allowing hierarchical classification of their features. This taxonomy can be reflected in the design of musical signatures which are used within the CAITLIN program auralization system. Experiments using these hierarchical leitmotifs should (see note in EXPERIMENT section) indicate that their similarities can be put to good use in communicating information about program structure and state