Pizzicato (/ˌpɪtsɪˈkɑːtoʊ/; Italian: pizzicato [pittsiˈkaːto], translated as pinched, and sometimes roughly as plucked) is a playing technique that involves plucking the strings of a string instrument. The exact technique varies somewhat depending on the type of stringed instrument.
When a string is struck or plucked, as with pizzicato, sound waves are generated that do not belong to a harmonic series as when a string is bowed. This complex timbre is called inharmonicity. The inharmonicity of a string depends on its physical characteristics, such as tension, composition, diameter and length. The inharmonicity disappears when strings are bowed because the bow's stick-slip action is periodic, so it drives all of the resonances of the string at exactly harmonic ratios, even if it has to drive them slightly off their natural frequency.
The first recognised use of pizzicato in classical music is found in Tobias Hume's Captain Humes Poeticall Musicke (1607), wherein he instructs the viola da gamba player to use pizzicato ('thumpe'). Another early use is found in Claudio Monteverdi's Il combattimento di Tancredi e Clorinda (around 1638), in which the players are instructed to use two fingers of their right hand to pluck the strings. Later, in 1756, Leopold Mozart in his Versuch einer gründlichen Violinschule instructs the player to use the index finger of the right hand. This has remained the most usual way to execute a pizzicato, though sometimes the middle finger is used. The bow is held in the hand at the same time unless there is enough time to put it down and pick it up again between bowed passages.