Tap the fingers onto the fretboard and tap the guitar to hear the chord. Tap a note on and off by pressing it again, tapping on the note on the left hand side (by the nut) will change the string mode, from open (o), played (T) and Not played (X). The notes of the chord are shown below So I've added a bunch of presets, a picking mode, click on the pick guitar and it'll start playing as you mess with the notes or chose presets. More presets to come when I can be bothered! Might consider optimising it so there's no lag when you change preset... We'll see!