A system and method of enhancing guitar instruction based on Tablature Plus encoding of playing techniques within a MIDI file or other data structure, that may be rendered on an associated player application that provides multimedia output of the piece being played including a number of playing techniques....http://www.google.co.uk/patents/US7446253?utm_source=gb-gplus-sharePatent US7446253 - Method and apparatus for sensing and displaying tablature associated with a stringed musical instrument
