A tool for providing user-configurable earcons, i.e. auditory cues, includes an earcon event engine responsive to command messages issued by tasks executing on a computer system. The command messages include an index to an earcon data file, which, in turn includes a reference to an audio file...http://www.google.de/patents/US5826064?utm_source=gb-gplus-sharePatent US5826064 - User-configurable earcon event engine
