An acoustic piano is, in a sense, as old-school as one can get. With an acoustic piano, there are two sub-options to choose from: the upright piano has strings that run vertically, which means that you are going to need some room in order to have it fit comfortably in a house or apartment. The grand piano is strung horizontally, so that you don’t really have to worry about height. However, in terms of size, grand pianos are larger. You’re going to need more space to fit a grand piano into your home, and a lot of energy to move it around as needed.
There is a reason that acoustic pianos tend to sound so much more natural – it’s because they are! Digital keyboards actually have recordings of acoustic pianos that are played back electronically when the person playing it hits a key. Acoustic pianos, however, have actions and hammers. Hammers are connected to the keys and strings through actions, and when a player strikes a key, the action activates the hammer, which strikes the string and causes a vibration – this is where the noise of a piano comes from.
Acoustic pianos are also going to have to be placed in a room where the temperature is as stable as possible. With a fluctuating temperature, the tuning of the piano strings are going to be thrown off and not sound right, and re-tuning an acoustic piano is going to be a pain, even if you know what you are doing. More at http://toptablelamp.com/.
So now you might be asking – how are grand and upright pianos different, then? Do they produce the same sound, since they are both acoustic? Well, they produce similar sounds, but they can actually be quite different if you know what to listen for.