For those who are not a musician or who are not familiar with music theory, a chord is simply two or more notes played at the same time. For example, if someone put one hand on a piano and hit two keys at the same time, that would be a chord.

An agreement

An chord or grouping of simultaneously played notes can create harmony, with two or more notes complementing each other. Chords add structure to a melody and can even add rhythm to a song. The most commonly played chords are triads, a group of three, so named because they consist of three different notes: the root tone and intervals of a third and a fifth above the root tone.

Different types of chords

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