Grand Piano - Version 4.0 Grand Piano is very easy to play and at the same time an interesting application. Now you have the opportunity to play and compose music on your computer! The program is not only a piano, but many other instruments including an organ, violin, flute, accordion, acoustic guitar, harp, drum, and so on. Play by pressing keys on the keyboard or clicking the mouse.Grand Piano is very easy to play and at the same time an interesting application. Now you have the opportunity to play and compose music on your computer! The program is not only a piano, but many other instruments including an organ, violin, flute, accordion, acoustic guitar, harp, drum, and so on. Play by pressing keys on the keyboard or clicking the mouse.Grand Piano is very easy to play and at the same time an interesting application. Now you have the opportunity to play and compose music on your computer! The program is not only a piano, but many other instruments including an organ, violin, flute,