In Dublin Ireland in August, 1999, a crusty street musician was playing an old guitar upon which was mounted a frame over the sound hole. On the frame were 6 keyes which he played piano style. As he pushed a key, a guitar string was hammered beneath the frame making a fantastic sound. Anyone know what the instrument was or who the grizzeled ole character was? He told me he was about to open for an Art Garfunkle concert in Dublin.