@Demonic Angel well I basically could see being able to amplify a lot of soul techniques and having various attacks depending on song/tunes played. though most of the techniques wouldn't be available until they begin to learn soul resonance, sense it would require a certain level of resonance in order to activate certain ones. just like how the Lantern Weapon could use fire as an attack, the guitar could use sound in various ways in more than just a shock wave.