What instrument has 88 black and white keys?

The instrument distinguished by its eighty-eight black and white keys is the piano. This standard configuration consists of 52 white keys and 36 black keys, providing a comprehensive range of notes for musicians. The white keys represent the natural notes of the musical scale, while the black keys are used for sharps and flats, allowing for the intricate harmonies and melodies found in countless musical compositions. This specific number of keys covers seven full octaves plus a minor third, offering a wide spectrum of pitches from deep bass to sparkling treble.

The piano's lineage traces back to instruments like the harpsichord, but it was Italian inventor Bartolomeo Cristofori who created the first "gravicembalo col piano e forte" around 1700. This name, meaning "harpsichord with soft and loud," highlighted its revolutionary ability to produce varying volumes based on the player's touch, a feature lacking in its predecessors. Early pianos had fewer keys, with Cristofori's initial designs featuring around 49. However, as composers like Beethoven and Liszt began writing more ambitious and expansive musical works, the demand for a broader tonal range led instrument makers to gradually expand the keyboard.

The 88-key standard became widely adopted in the late 1880s, largely influenced by manufacturers like Steinway & Sons. This range was found to be a practical and musically significant sweet spot, encompassing nearly all the notes discernible to the human ear and fulfilling the requirements of most classical and contemporary music. When a key is pressed, a complex internal mechanism causes a felt-covered hammer to strike a set of strings, which then vibrate and produce sound, amplified by a large wooden soundboard. This intricate design allows the piano to be an incredibly versatile instrument, capable of expressing a vast array of emotions and dynamics.