The piano is the most versatile instrument in Western music, capable of playing melody and harmony simultaneously. Its 88 keys span over seven octaves, from deep bass notes to sparkling treble. The player controls dynamics through touch — pressing harder produces a louder forte, lighter touch a softer piano. The three pedals (damper pedal, sostenuto, and una corda) further shape the sound, adding sustain, selective resonance, or a muted timbre.
The piano repertoire is vast, encompassing virtually every style from baroque to jazz to contemporary. Mozart, Beethoven, Chopin, Liszt, Debussy, and Rachmaninoff all wrote masterpieces for the instrument. As an accompaniment instrument, the piano supports singers in art song (the German lied tradition), provides the harmonic foundation in jazz combos, and serves as the primary tool for composition and arrangement. Its ability to play chords, arpeggios, counterpoint, and melody makes it the ideal instrument for understanding harmony and music theory.
The word piano is short for pianoforte, which Bartolomeo Cristofori named his invention because, unlike the harpsichord, it could play both soft (piano) and loud (forte).