First a bit of the science of sound. Hard surfaces reflect sound.
Soft surfaces absorb it.
Where Your Piano is Placed Where you place your piano influences how it sounds. Conversely, a room with a plethora of soft surfaces, such as upholstered furniture, thick carpet and drapery, and people, has a more subdued acoustic condition. If you want a bright, incisive sound, place your instrument in a room with a preponderance of hard surfaces. If you prefer a more muffled tone, don't worry about hard surfaces. If necessary, add soft surfaces to help absorb the sound.