An interesting use of midi data can be seen with the Fretlight Guitar: http://www.fretlight.com http://www.fretlight.com (disclaimer, I work for them). Midi dat

An interesting use of midi data can be seen with the Fretlight Guitar: http://www.fretlight.com http://www.fretlight.com (disclaimer, I work for them). Midi data is tagged so that it can light up the guitar fretboard to teach you how to play. Any Guitar Pro 6 tab can light up the Fretlight.