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What is a cord?

In music and music theory a chord (from the middle English cord, short for accord) is three or more notes sounding simultaneously, or near simultaneously over a period of time. In layman's terms, if you simultaneously play any three (or more) keys of let's say, a piano, you have just played a chord. Or, if you simultaneously play three or more strings of a guitar, you have just played a chord on the guitar. Every chord is given a specific name, based on what notes constitute the chord and the di

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