Designing Piano Technique: A Historical and Industrial Design Analysis of Piano-Playing Aids From 1814 to the Present

This study examines piano-playing aids documented from 1814 to the present from an industrial design history perspective.Thirty-four product configurations, documented through October 2026 and identified from patents, method books, period advertisements, museum records, manufacturers' documentation, and academic publications, were compared in terms of problem framing, bodily intervention, adjustability, feedback, skill transfer, and type of evidence.The findings show that these aids did not develop linearly from mechanical to digital technologies.Physical guides, resistance devices, silent practice keyboards, ergonomic adaptations, accessibility systems, computational feedback, and robotic prototypes instead embody different historical design approaches within the same product field.The study conceptualizes these products as materialized pedagogy, through which pedagogical ideas are translated into material or computational features.The principal historical transformation was an expansion of intervention across the body, instrument, interface, and instructional system.The results indicate that technical function, pedagogical claim, and scientific evidence should be distinguished, while user autonomy, bodily diversity, accessibility, and skill transfer should be evaluated together.The study accordingly proposes a conceptual qualitative industrial design evaluation framework for piano-playing aids, illustrated through three cases but not empirically validated.