Whats the difference between a piano and a harpsichord?
A harpsichord produces sound by means of a plectrum plucking the string as it goes by it. The piano strikes the string and rebounds from the string. The harpsichord can only increase volume by linking up other plectri to other strings. It doesn’t matter how hard you press the key of the harpsichord; it will produce the same volume. The piano will produce more volume the harder you strike the key.