The piano dulcimer was invented by Sam Rizzetta to allow playing all notes of a chromatic scale, and to play equally well in all keys. Pictured here is a 6-16-6 featuring 3 octaves and 7 half steps. The size is 45″x20″x5″ and is like the model PD-40 but with a larger, more powerful tone. For a complete explanation including tuning and setup, download the free book.