Acoustic Piano is, in a sense, as old-school as one can get. It has hammers and steel strings that are enclosed by a wooden exterior. The keys are connected to the hammers. When a key is pressed, the hammer moves and strikes the strings, causing them to vibrate and produce the sound. Acoustic Piano produces a sound when the hammer strikes a string. It gives you an authentic, acoustic sound that has a warmer, more resonant tone. You also have better control over the articulation and expression of the musical notes.