
horizontal (like the grand piano) and the hammer has to strike the key essentially vertically. are secondary considerations to the fact that the soundboard and frame are upright vs. All the other attributes such as space saver, design, convenience, etc. the hammer being at a 90-degree angle relative to the keys. The main thing to know about the upright piano is that it is fundamentally different from the grand piano due to its physical parameters, i.e. It comes in a variety of shapes and sizes, true, and we shall get to it shortly.
