An interactive museum exhibit of a digitally augmented medieval musical instrument, the tromba marina, is presented. The tromba marina is a curious single stringed instrument with a rattling bridge, from which a trumpet-like timbre is produced. The physical instrument was constructed as a replica of one found in Musikmuseet in Frederiksberg. The replicated instrument was augmented with a pickup, speakers and digital signal processing to create a more reliable, approachable and appropriate instrument for interactive display in the museum. We report on the evaluation of the instrument performed at the Danish museum of musical instruments.