High Quality Content by WIKIPEDIA articles! A guitar harmonic is a musical note played by preventing or amplifying vibration of certain overtones of a guitar string. Music using harmonics can contain very high pitch notes difficult or impossible to reach by fretting. Guitar harmonics also produce a different sound quality than fretted notes, and are one of many techniques used to create musical variety. Harmonics are mainly generated manually by different playing techniques. Another method is sound wave feedback of a high volume guitar amplifier which causes an "infinite" vibration of certain string harmonics. As a third method magnetic string drivers like the EBow can be used for generating string harmonics. Harmonics are most often played by lightly placing a finger on a string at a nodal point of one of the overtones at the moment when the string is driven. The finger immediately damps all overtones that do not have a node near the location touched. The lowest-pitch overtone dominates the resulting sound.

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