Tracks education software developer, Joerg Garbers today announces Guidonian Hand 1 . 0 for the purpose of iPhone, iPad and i-pod touch. In Medieval music, all of the Guidonian hand was a mnemonic device used to assist performers in learning to sight-sing. Accompanied by Guidonian Hand, users could certainly learn how it was used and now have some fun making music. Such a app turns images of the classic Guidonian hand into a pc style keyboard which users can play golf. Users can also play on albums of real hands on account of hand recognition.