[Piano] options are displayed when you select [Piano] from the [Select Group] combo box in the [Instrument] dialog box. You will see the selected instrument in the [ Instrument ] window.

Acoustic Grand Piano This is a sound of  acoustic grand piano. Bright Grand Piano This is a sound of bright grand piano. Electric Grand Piano This is a sound of electric grand piano. Honky-Tonk Piano Creates a piano sound that is out of interval. Electronic Piano 1 This is a sound of electronic piano. Electronic Piano 2 This is a sound of electronic piano. Harpsicord This is a sound of harpsicord. This is called "cembalo" as well. Clavinet This is a sound of clavinet.