/learn/publications/b/blog/posts/the-gtar-a-ffull-fledged-ios-guitar-learning-tool-for-the-techy-musicianThe gTar sports a full guitar body with an iPhone dock to communicate with the free gTar app and an LED sensor fitted fretboard to guide users as the play. (via gTar ) An engineering example to note. We all can learn from some obvious innovation....en-USTelligent Community 12